Holtek HT67F2350 Manual page 195

HT67F2350/HT67F2360
HT67F2370/HT67F2390
Advanced A/D Flash MCU with LCD & EEPROM
SCL
SDA
SCL
SDA
When an I C time-out counter overflow occurs, the counter will stop and the SIMTOEN bit will
2
be cleared to zero and the SIMTOF bit will be set high to indicate that a time-out condition has
occurred. The time-out condition will also generate an interrupt which uses the I
When an I C time-out occurs, the I
2
into the following condition:
The SIMTOF flag can be cleared by the application program. There are 64 time-out period selections
which can be selected using the SIMTOS bits in the SIMTOC register. The time-out duration is
calculated by the formula: ((1~64) × (32/f
about 1ms to 64ms.
• SIMTOC Register
Bit 7
Name SIMTOEN SIMTOF SIMTOS5 SIMTOS4 SIMTOS3 SIMTOS2 SIMTOS1 SIMTOS0
R/W R/W
POR 0
Bit 7 SIMTOEN: SIM I
0: Disable
1: Enable
Bit 6 SIMTOF: SIM I
0: No time-out occurred
1: Time-out occurred
Bit 5~0 SIMTOS5~SIMTOS0: SIM I
I C Time-out clock source is f
2
I C Time-out period is equal to (SIMTOS[5:0]+1) × (32/f
2
Rev. 1.60
Start Slave Address
1 0 1 1
1 0 0 1 0
2
I C time-out counter reset
on SCL negative transition
I C Time-out
2
C internal circuitry will be reset and the registers will be reset
2
Register
SIMD, SIMA, SIMC0
SIMC1
I C Register after Time-out
2
)). This gives a time-out period which ranges from
SUB
6 5 4
R/W R/W R/W
0 0 0
C Time-out control
2
C Time-out flag
2
C Time-out period selection
2
/32
SUB
195
SRW ACK
0 1 0 1 0
2
I C time-out
counter start
Stop
1 0 0
C interrupt vector.
2
After I C Time-out
2
No change
Reset to POR condition
3 2
R/W R/W R/W
0 0
)
SUB
1 0
R/W
0 0
May 16, 2019