Holtek HT67F2350 Manual page 189

HT67F2350/HT67F2360
HT67F2370/HT67F2390
Advanced A/D Flash MCU with LCD & EEPROM
Bit 4 Unimplemented, read as "0"
Bit 3~2 SIMDEB1~SIMDEB0: I
00: No debounce
01: 2 system clock debounce
1x: 4 system clock debounce
These bits are used to select the I
I C interface function by setting the SIM2~SIM0 bits to "110".
2
Bit 1 SIMEN: SIM Enable Control
0: Disable
1: Enable
The bit is the overall on/off control for the SIM interface. When the SIMEN bit is
cleared to zero to disable the SIM interface, the SDI, SDO, SCK and SCS, or SDA and
SCL lines will lose their SPI or I
reduced to a minimum value. When the bit is high the SIM interface is enabled. The
SIM configuration option must have first enabled the SIM interface for this bit to be
effective.If the SIM is configured to operate as an SPI interface via the SIM2~SIM0
bits, the contents of the SPI control registers will remain at the previous settings when
the SIMEN bit changes from low to high and should therefore be first initialised by
the application program. If the SIM is configured to operate as an I
SIM2~SIM0 bits and the SIMEN bit changes from low to high, the contents of the I
control bits such as HTX and TXAK will remain at the previous settings and should
therefore be first initialised by the application program while the relevant I
such as HCF, HAAS, HBB, SRW and RXAK will be set to their default states.
SIMICF: SIM SPI Incomplete Flag
Bit 0
The SIMICF bit is only used in the SPI mode and the detailed definition is described
in the SPI section.
• SIMC1 Register
Bit 7
Name HCF
R/W R
POR 1
HCF: I
Bit 7
0: Data is being transferred
1: Completion of an 8-bit data transfer
The HCF flag is the data transfer flag. This flag will be zero when data is being
transferred. Upon completion of an 8-bit data transfer the flag will go high and an
interrupt will be generated.
Bit 6 HAAS: I
0: Not address match
1: Address match
The HAAS flag is the address match flag. This flag is used to determine if the slave
device address is the same as the master transmit address. If the addresses match then
this bit will be high, if there is no match then the flag will be low.
Bit 5 HBB: I
0: I
1: I
The HBB flag is the
will occur when a START signal is detected. The flag will be set to "0" when the bus is
free which will occur when a STOP signal is detected.
HTX: I
Bit 4
0: Slave device is the receiver
1: Slave device is the transmitter
Rev. 1.60
C Debounce Time Selection
2
C debounce time when the SIM is configured as the
2
C function and the SIM operating current will be
2
6 5 4
HAAS HBB HTX
R R R/W
0 0 0
C Bus data transfer completion flag
2
C Bus data transfer completion flag
2
C Bus busy flag
2
C Bus is not busy
2
C Bus is busy
2
I C busy flag. This flag will be "1" when the
2
C slave device transmitter/receiver selection
2
189
C interface via the
2
3 2 1
TXAK SRW IAMWU
R/W R/W R/W
0 0 0
I C bus is busy which
2
May 16, 2019
C
2
C flags
2
0
RXAK
R
1