ADUC7121 Analog Devices, ADUC7121 Datasheet - Page 40

• Manufacturer Part Number: ADUC7121
• Description: Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU
• Manufacturer: Analog Devices

Specifications of ADUC7121

• Mcu Core: ARM7 TDMI
• Mcu Speed (mips): 40
• Sram (bytes): 8192Bytes
• Gpio Pins: 32
• Adc # Channels: 9

ADuC7121
Reset Operation
There are four types of reset: external reset, power-on reset,
watchdog expiration, and software force. The RSTSTA register
indicates the source of the last reset and RSTCLR clears the
RSTSTA register. These registers can be used during a reset
Table 47. Remap MMR Bit Designations (Address = 0xFFFF0220, Default Value = 0x00)
Bit
0
Table 48. RSTSTA MMR Bit Designations (Address = 0xFFFF0230, Default Value = 0x0X)
Bit
7:3
2
1
0
Name
Remap
Description
Reserved.
Software reset.
Set by the user to force a software reset.
Cleared by setting the corresponding bit in RSTCLR.
Watchdog timeout.
Set automatically when a watchdog timeout occurs.
Cleared by setting the corresponding bit in RSTCLR.
Power-on reset.
Set automatically when a power-on reset occurs.
Cleared by setting the corresponding bit in RSTCLR.
Set by the user to remap the SRAM to Address 0x00000000.
Description
Remap bit.
Cleared automatically after reset to remap the Flash/EE memory to Address 0x00000000.
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exception service routine to identify the source of the reset.
If RSTSTA is null, the reset was external. Note that when
clearing RSTSTA, all bits that are currently set to 1 must be
cleared. Otherwise, a reset event occurs.