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README.dk20k200_std32
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===============================================================================
C P U , M E M O R Y , I N / O U T C O M P O N E N T S
===============================================================================
see also [1]-[4]
CPU: "standard_32"
32 bit NIOS for 33.333 MHz (nasys_clock_freq = 33333000)
256 Byte for register file (15 levels)
no instruction cache
no data cache
1 KByte On Chip ROM with GERMS boot monitor
no On Chip RAM
MSTEP multiplier
no Debug Core
no On Chip Instrumentation (OCI) enabled
U-Boot CFG: CONFIG_SYS_NIOS_CPU_CLK = 50000000
CONFIG_SYS_NIOS_CPU_ICACHE = 0
CONFIG_SYS_NIOS_CPU_DCACHE = 0
CONFIG_SYS_NIOS_CPU_REG_NUMS = 256
CONFIG_SYS_NIOS_CPU_MUL = 0
CONFIG_SYS_NIOS_CPU_MSTEP = 1
CONFIG_SYS_NIOS_CPU_DBG_CORE = 0
IRQ: Nr. | used by
------+--------------------------------------------------------
25 | TIMER0 | CONFIG_SYS_NIOS_CPU_TIMER0_IRQ = 25
26 | UART0 | CONFIG_SYS_NIOS_CPU_UART0_IRQ = 26
27 | PIO2 | CONFIG_SYS_NIOS_CPU_PIO2_IRQ = 27
28 | UART1 | CONFIG_SYS_NIOS_CPU_UART1_IRQ = 28 (debug)
MEMORY: 1 MByte Flash
256 KByte SRAM
(SDRAM with standard SODIMM only)
Timer: TIMER0: high priority programmable timer (IRQ25)
U-Boot CFG: CONFIG_SYS_NIOS_CPU_TICK_TIMER = 0
PIO: Nr. | description
------+--------------------------------------------------------
PIO0 | SEVENSEG: 16 outputs for user seven segment display
PIO1 | LED: 8 outputs for user LEDs
PIO2 | BUTTON: 4 inputs for user push buttons (IRQ27)
PIO3 | LCD: 11 in/outputs for ASCII LCD
U-Boot CFG: CONFIG_SYS_NIOS_CPU_SEVENSEG_PIO = 0
CONFIG_SYS_NIOS_CPU_LED_PIO = 1
CONFIG_SYS_NIOS_CPU_BUTTON_PIO = 2
CONFIG_SYS_NIOS_CPU_LCD_PIO = 3
UART: UART0: fixed baudrate of 115200, fixed protocol 8N2,
without handshake RTS/CTS (IRQ26)
UART1: fixed baudrate of 115200, fixed protocol 8N1,
without handshake RTS/CTS (IRQ28)
===============================================================================
M E M O R Y M A P
===============================================================================
- - - - - - - - - - - external memory - - - - - - - - - - - - - - - - - - -
0x00200000 ---15------------8|7-------------0-
| sector 18 | \
+ 0x0f0000 |- - - - - - - - - - - - - - - -| |
| : | |
Flash |- - - - : - - - -| |
| sector 5 : | |
+ 0x020000 |- - - - - - - - -| |
| sector 4 (size = 0x10000) | |
+ 0x010000 |- - - - - - - - - - - - - - - -| > CONFIG_SYS_NIOS_CPU_FLASH_SIZE
| sector 3 (size = 0x08000) | | = 0x00100000
+ 0x008000 |- - - - - - - - - - - - - - - -| |
| sector 2 (size = 0x02000) | |
+ 0x006000 |- - - - - - - - - - - - - - - -| |
| sector 1 (size = 0x02000) | |
+ 0x004000 |- - - - - - - - - - - - - - - -| |
| sector 0 (size = 0x04000) | /
0x00100000 ---15------------8|7-------------0- CONFIG_SYS_NIOS_CPU_FLASH_BASE
| |
: gap :
| |
0x00080000 ---32-----------16|15------------0-
0x00080000 --+32-----------16|15------------0+
| . | \ \
| . | | |
| . | | > CONFIG_SYS_NIOS_CPU_VEC_SIZE
| . | | | = 0x00000100
| . | | /
0x0007ff00 |- - - - - - - - - - - - - - - -+-|- CONFIG_SYS_NIOS_CPU_VEC_BASE
0x0007ff00 |- - - - - - - - - - - - - - - -+-|- CONFIG_SYS_NIOS_CPU_STACK
| . | | \
| . | | |
| . | | > stack area
| . | | |
| . | | V
| . | |
SRAM | . | > CONFIG_SYS_NIOS_CPU_SRAM_SIZE
| . | | = 0x00040000
| | /
0x00040000 ---32-----------16|15------------0- CONFIG_SYS_NIOS_CPU_SRAM_BASE
| |
: gap :
: :
- - - - - - - - - - - on chip i/o - - - - - - - - - - - - - - - - - - -
: :
: gap :
| |
0x00000400 ---32-----------16|15------------0-
| (unused) | \
+ 0x1c |- - - - - - - - - - - - - - - -| |
| (unused) | |
+ 0x18 |- - - - - - - - - - - - - - - -| |
| (unused) | |
+ 0x14 |- - - - - - - - - - - - - - - -| |
UART1 | (unused) | > 0x00000020
[2] + 0x10 |- - - - - - - - - - - - - - - -| |
| control (10 bit) (rw) | |
+ 0x0c |- - - - - - - - - - - - - - - -| |
| status (10 bit) (rw) | |
+ 0x08 |- - - - - - - - - - - - - - - -| |
| txdata (8 bit) (wo) | |
+ 0x04 |- - - - - - - - - - - - - - - -| |
| rxdata (8 bit) (ro) | /
0x000004c0 ---32-----------16|15------------0- CONFIG_SYS_NIOS_CPU_UART1
| |
: gap :
| |
0x00000490 ---32-----------16|15------------0-
| (unused) | \
+ 0x0c |- - - - - - - - - - - - - - - -| |
PIO3 | (unused) | |
[4] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
| direction (11 bit) (rw) | |
+ 0x04 |- - - - - - - - - - - - - - - -| |
| data (11 bit) (rw) | /
0x00000480 ---32-----------16|15------------0- CONFIG_SYS_NIOS_CPU_PIO3
| edgecapture (12 bit) (rw) | \
+ 0x0c |- - - - - - - - - - - - - - - -| |
PIO2 | interruptmask (12 bit) (rw) | |
[4] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
| (unused) | |
+ 0x04 |- - - - - - - - - - - - - - - -| |
| data (12 bit) (ro) | /
0x00000470 ---32-----------16|15------------0- CONFIG_SYS_NIOS_CPU_PIO2
| (unused) | \
+ 0x0c |- - - - - - - - - - - - - - - -| |
PIO1 | (unused) | |
[4] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
| direction (2 bit) (rw) | |
+ 0x04 |- - - - - - - - - - - - - - - -| |
| data (2 bit) (rw) | /
0x00000460 ---32-----------16|15------------0- CONFIG_SYS_NIOS_CPU_PIO1
| (unused) | \
+ 0x1c |- - - - - - - - - - - - - - - -| |
| (unused) | |
+ 0x18 |- - - - - - - - - - - - - - - -| |
| snaph (16 bit) (rw) | |
+ 0x14 |- - - - - - - - - - - - - - - -| |
TIMER0 | snapl (16 bit) (rw) | |
[3] + 0x10 |- - - - - - - - - - - - - - - -| > 0x00000020
| periodh (16 bit) (rw) | |
+ 0x0c |- - - - - - - - - - - - - - - -| |
| periodl (16 bit) (rw) | |
+ 0x08 |- - - - - - - - - - - - - - - -| |
| control (4 bit) (rw) | |
+ 0x04 |- - - - - - - - - - - - - - - -| |
| status (2 bit) (rw) | /
0x00000440 ---32-----------16|15------------0- CONFIG_SYS_NIOS_CPU_TIMER0
| (unused) | \
+ 0x0c |- - - - - - - - - - - - - - - -| |
PIO0 | (unused) | |
[4] + 0x08 |- - - - - - - - - - - - - - - -| > 0x00000010
| (unused) | |
+ 0x04 |- - - - - - - - - - - - - - - -| |
| data (16 bit) (wo) | /
0x00000420 ---32-----------16|15------------0- CONFIG_SYS_NIOS_CPU_PIO0
| (unused) | \
+ 0x1c |- - - - - - - - - - - - - - - -| |
| (unused) | |
+ 0x18 |- - - - - - - - - - - - - - - -| |
| (unused) | |
+ 0x14 |- - - - - - - - - - - - - - - -| |
UART0 | (unused) | > 0x00000020
[2] + 0x10 |- - - - - - - - - - - - - - - -| |
| control (10 bit) (rw) | |
+ 0x0c |- - - - - - - - - - - - - - - -| |
| status (10 bit) (rw) | |
+ 0x08 |- - - - - - - - - - - - - - - -| |
| txdata (8 bit) (wo) | |
+ 0x04 |- - - - - - - - - - - - - - - -| |
| rxdata (8 bit) (ro) | /
0x00000400 ---32-----------16|15------------0- CONFIG_SYS_NIOS_CPU_UART0
- - - - - - - - - - - on chip memory - - - - - - - - - - -
0x00000400 ---32-----------16|15------------0-
| : | \
| : | |
GERMS | : | > na_boot_monitor_rom_size
| : | | = 0x00000400
| : | /
0x00000000 |- - - - - - - - - - - - - - - -+- - nasys_reset_address
0x00000000 ---32-----------16|15------------0- na_boot_monitor_rom
===============================================================================
F L A S H M E M O R Y A L L O C A T I O N
===============================================================================
0x00200000 ---15------------8|7-------------0-
| : | \
SAFE | : | > 256 KByte
FPGA conf. | : | / (NOT usable by software)
0x001c0000 --+- - - - - - - -:- - - - - - - -+-
| : | \
USER | : | > 256 KByte
FPGA conf. | : | / (NOT usable by software)
0x00180000 --+- - - - - - - -:- - - - - - - -+-
| : | \
| : | |
| : | > 512 KByte free for use
0x00140000 --+- - - - - - - -:- - - - - - - -+-|- u-boot _start()
| : | /
0x00100000 ---15------------8|7-------------0-
===============================================================================
R E F E R E N C E S
===============================================================================
[1] http://www.altera.com/literature/ds/ds_nios_board_apex_20k200e.pdf
[2] http://www.altera.com/literature/ds/ds_nios_uart.pdf
[3] http://www.altera.com/literature/ds/ds_nios_timer.pdf
[4] http://www.altera.com/literature/ds/ds_nios_pio.pdf
===============================================================================
Stephan Linz <[email protected]>