Registers

GPIO

Name	Address	Width	GPIO bitmasks associated with this register
GPIO_DATA0	0x10147000	2	0x1, 0x2, 0x4
GPIO_DATA1	0x10147010	4	0x8, 0x10
GPIO_DATA2	0x10147014	2	0x20
GPIO_DATA3	0x10147020	2	0x40, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000, 0x2000, 0x4000, 0x8000, 0x10000, 0x20000
GPIO_DATA3_INTERRUPT_CLEAR	0x10147022	2	0x40, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000, 0x2000, 0x4000, 0x8000, 0x10000, 0x20000
??	0x10147024	2	0x40, 0x80, 0x100, 0x200, 0x400, 0x800, 0x1000, 0x2000, 0x4000, 0x8000, 0x10000, 0x20000
?	0x10147026	2	?
GPIO_DATA4	0x10147028	2	0x40000

Name	Address	Width	Description
RTC_CNT	0x10147100	2	Control register
RTC_REG_STAT1	0x10147110	1	Rtc status register 1 (command 0). Bitswapped
RTC_REG_STAT2	0x10147111	1	Rtc status register 2 (command 1). Bitswapped
RTC_REG_CLKADJ	0x10147112	1	Rtc clock adjustment register (command 6). Bitswapped
RTC_REG_FREE	0x10147113	1	The free general purpose rtc register (command 7). Bitswapped
RTC_REG_TIME1	0x10147120	4	Byte-wise bit-swapped (bit7 is bit0, etc.) BCD RTC (byte0 = seconds, byte1 = minutes, byte2 = hours, byte3 = day of week)
RTC_REG_TIME2	0x10147124	4 (3?)	Day, month and year all byte-wise bit-swapped
RTC_REG_ALRMTIM1	0x10147130	4 (3?)	Rtc alarm time register 1 (command 4). Byte-wise bit-swapped
RTC_REG_ALRMTIM2	0x10147134	4 (3?)	Rtc alarm time register 2 (command 5). Byte-wise bit-swapped
RTC_REG_COUNT	0x10147140	4 (3?)	Rtc dsi counter register (ex command 0). Byte-wise bit-swapped
RTC_REG_FOUT1	0x10147150	1	Rtc dsi fout register 1 (ex command 1). Bitswapped
RTC_REG_FOUT2	0x10147151	1	Rtc dsi fout register 2 (ex command 2). Bitswapped
RTC_REG_ALRMDAT1	0x10147160	4 (3?)	Rtc dsi alarm date register 1 (ex command 4). Byte-wise bit-swapped
RTC_REG_ALRMDAT2	0x10147164	4 (3?)	Rtc dsi alarm date register 2 (ex command 5). Byte-wise bit-swapped

Bit	Description
24	Enable/disable? GPIO interrupt 0x64 (bitmask 0x8)
25	Enable/disable? GPIO interrupt 0x66 (bitmask 0x10)

Bit	Description
0-2	Used for GPIO bitmask 0x7.
1	DS EXTKEYIN Pen down (0 = touching, 1 = not touching)
3	Unused by GPIO-sysmodule and TwlBg.
4	Only used by Boot11.
5-15	Unused by GPIO-sysmodule and TwlBg.

Bit	Description
0-1	Used for GPIO bitmask 0x18.
2-31	Unused by GPIO-sysmodule and TwlBg.

Bit	Description
0	Used for GPIO bitmask 0x20.
1-15	Unused by GPIO-sysmodule and TwlBg.

Bit	Description
0-11	Used for GPIO bitmask 0x3FFC0.
12-31	Unused by GPIO-sysmodule and TwlBg.

Bit	Description
0	Used for GPIO bitmask 0x40000.
1-15	Unused by GPIO-sysmodule and TwlBg.

Bit	Description
0	Latch STAT1
1	Latch STAT2
2	Latch CLKADJ
3	Latch FREE
4	Latch TIME
5	Latch ALRMTIM1
6	Latch ALRMTIM2
7	Latch COUNT
8	Latch FOUT1
9	Latch FOUT2
10	Latch ALRMDAT1
11	Latch ALRMDAT2
12	ARM7 Busy? This may be chipselect
13	ARM7 read command received? (writing 1 clears it seems)
14	ARM7 write command recieved? (writing 1 clears it seems)
15	DS SIO SI pin (rtc irq pin)

After bootrom initialization, these are the values of the registers: