ADUC7024_15 Datasheet, PDF (55/104 Pages) Analog Devices – Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU

Data Sheet
Reset Operation
There are four kinds of reset: external, power-on, watchdog
expiration, and software force. The RSTSTA register indicates
the source of the last reset, and RSTCLR allows clearing of the
RSTSTA register. These registers can be used during a reset
exception service routine to identify the source of the reset.
If RSTSTA is null, the reset is external.
Table 44. REMAP Register
Name
Address
REMAP
0xFFFF0220
1 _{Depends on the model.}
Default Value
0xXX¹
Access
R/W
Table 45. REMAP MMR Bit Designations
Bit Name Description
4
Read-only bit. Indicates the size of the Flash/EE
memory available. If this bit is set, only 32 kB of
Flash/EE memory is available.
3
Read-only bit. Indicates the size of the SRAM
memory available. If this bit is set, only 4 kB of
SRAM is available.
2:1
Reserved.
0
Remap Remap bit. Set by user to remap the SRAM to
Address 0x00000000. Cleared automatically
after reset to remap the Flash/EE memory to
Address 0x00000000.
ADuC7019/20/21/22/24/25/26/27/28/29
Table 46. RSTSTA Register
Name
Address
RSTSTA
0xFFFF0230
Default Value
0x01
Access
R/W
Table 47. RSTSTA MMR Bit Designations
Bit Description
7:3 Reserved.
2
Software reset. Set by user to force a software reset.
Cleared by setting the corresponding bit in RSTCLR.
1
Watchdog timeout. Set automatically when a watchdog
timeout occurs. Cleared by setting the corresponding
bit in RSTCLR.
0
Power-on reset. Set automatically when a power-on
reset occurs. Cleared by setting the corresponding bit
in RSTCLR.
Table 48. RSTCLR Register
Name
Address
RSTCLR
0xFFFF0234
Default Value
0x00
Access
W
Note that to clear the RSTSTA register, the user must write 0x07
to the RSTCLR register.
Rev. F | Page 55 of 104