参数资料
型号: ADUC7033BSTZ-88-RL
厂商: Analog Devices Inc
文件页数: 25/140页
文件大小: 0K
描述: IC BATT SENSOR PREC 48LQFP
标准包装: 2,000
功能: 电池监控器
电源电压: 3.5 V ~ 18 V
工作温度: -40°C ~ 115°C
安装类型: 表面贴装
封装/外壳: 48-LQFP
供应商设备封装: 48-LQFP(7x7)
包装: 带卷 (TR)
ADuC7033
RESET
RSTCLR Register
There are four kinds of reset: external reset, power-on-reset,
watchdog reset, and software reset. The RSTSTA register
indicates the source of the last reset and can also be written by
user code to initiate a software reset event. The bits in this
register can be cleared to 0 by writing to the RSTCLR MMR at
0xFFFF0234. The bit designations in RSTCLR mirror those of
RSTSTA. These registers can be used during a reset exception
service routine to identify the source of the reset. The implica-
Name:
Address:
Access:
Function:
RSTCLR
0xFFFF0234
Write only
This 8-bit write only register clears the
corresponding bit in RSTSTA.
tions of all four kinds of reset event are tabulated in Table 12.
Table 11. RSTSTA/RSTCLR MMR Bit Designations
RSTSTA Register
Name: RSTSTA
Bit
7 to 4
Description
Not Used. These bits are not used and always
read as 0.
Address:
Default Value:
Access:
Function:
0xFFFF0230
Depends on type of reset
Read/write access
This 8-bit register indicates the source of the
last reset event and can also be written by
user code to initiate a software reset.
3
2
1
External Reset.
Automatically set to 1 when an external reset occurs.
Cleared by setting the corresponding bit in RSTCLR.
Software Reset.
Set to 1 by user code to generate a soft-
ware reset.
Cleared by setting the corresponding bit in
RSTCLR. 1
Watchdog Timeout.
Automatically set to 1 when a watchdog timeout
occurs.
Cleared by setting the corresponding bit in RSTCLR.
0
Power-On Reset.
Automatically set when a power-on-reset occurs.
Cleared by setting the corresponding bit in RSTCLR.
1
If the software reset bit in RSTSTA is set, any write to RSTCLR that does not
clear this bit generates a software reset.
Table 12. Device Reset Implications
Impact
Reset
Reset All
External Pins
External MMRs
Reset All HV
RSTSTA
Reset
Source
POR
Watchdog
Software
External Pin
to Default
State
Yes
Yes
Yes
Yes
Kernel
Executed
Yes
Yes
Yes
Yes
(Excluding
RSTSTA)
Yes
Yes
Yes
Yes
Indirect
Registers
Yes
Yes
Yes
Yes
Peripherals
Reset
Yes
Yes
Yes
Yes
Watchdog
Timer Reset
Yes
No
No
No
SRAM
Valid 1
Yes/No 2
Yes
Yes
Yes
(Status After
Reset Event)
RSTSTA[0] = 1
RSTSTA[1] = 1
RSTSTA[2] = 1
RSTSTA[3] = 1
1
2
RAM is not valid in the case of a reset following LIN download.
The impact on SRAM is dependent on the HVSTA[6] contents if LVF is enabled. When LVF is enabled using HVCFG0[2], SRAM has not been corrupted by the POR reset
mechanism if the LVF Status Bit HVSTA[6] is 1. See the Low Voltage Flag (LVF) section for more information.
Rev. B | Page 25 of 140
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