Holtek HT67F2350 Manual page 100

There is an internal reset control register, RSTC, which is used to select the external RES pin
function and provide a reset when the device operates abnormally due to the environmental noise
interference. If the content of the RSTC register is set to any value other than 01010101B or
10101010B, it will reset the device after a delay time, t
value of 01010101B.
• RSTC Register
Bit 7
Name RSTC7
R/W R/W
POR 0
Bit 7~0 RSTC7~RSTC0: Reset function control
01010101: I/O pin
10101010: RES pin
Other values: Reset MCU
If these bits are changed due to adverse environmental conditions, the microcontroller
will be reset. The reset operation will be activated after a delay time, t
RSTF bit in the RSTFC register will be set to 1.
All resets will reset this register to POR value except the WDT time out hardware
warm reset. Note that if the register is set to 10101010 to select the RES pin, this
configuration has higher priority than other related pin-shared controls.
• RSTFC Register
Bit 7
Name —
R/W —
POR —
Bit 7~4 Unimplemented, read as "0"
RSTF: Reset control register software reset flag
Bit 3
0: Not occurred
1: Occurred
This bit is set to 1 by the RSTC control register software reset and cleared by the
application program. Note that this bit can only be cleared to 0 by the application
program.
Bit 2 LVRF: LVR function reset flag
Described elsewhere.
Bit 1 LRF: LVR control register software reset flag
Described elsewhere.
Bit 0 WRF: WDT control register software reset flag
Described elsewhere.
Rev. 1.60
Advanced A/D Flash MCU with LCD & EEPROM
SRESET
RSTC7 ~ RSTC0 Bits
01010101B
10101010B
Any other value
Internal Reset Function Control
6 5 4
RSTC6 RSTC5 RSTC4
R/W R/W R/W
1 0 1
6 5 4
— — —
— — —
— — —
100
HT67F2350/HT67F2360
HT67F2370/HT67F2390
. After power on the register will have a
Reset Function
I/O
RES
Reset MCU
3 2 1
RSTC3 RSTC2 RSTC1
R/W R/W R/W
0 1 0
SRESET
3 2 1
RSTF LVRF LRF
R/W R/W R/W
0 x 0
May 16, 2019
0
RSTC0
R/W
1
, and the
0
WRF
R/W
0
"x": unknown