HT66FV130 Datasheet, PDF (174/259 Pages) Holtek Semiconductor Inc – Enhanced Voice Flash MCU

HT66FV130/HT66FV140
HT66FV150/HT66FV160
Enhanced Voice Flash MCU
Bit 4
Bit 3~2
Bit 1
Bit 0
Unimplemented, read as "0"
SIMDEB1~SIMDEB0: I²C Debounce Time Selection
00: No debounce
01: 2 system clock debounce
1x: 4 system clock debounce
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 I²C function and the SIM operating current will be
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 I²C interface via the
SIM2~SIM0 bits and the SIMEN bit changes from low to high, the contents of the I²C
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 I²C flags
such as HCF, HAAS, HBB, SRW and RXAK will be set to their default states.
SIMICF: SIM Incomplete Flag
0: SIM incomplete condition not occurred
1: SIM incomplete condition occured
This bit is only available when the SIM is configured to operate in an SPI slave mode.
If the SPI operates in the slave mode with the SIMEN and CSEN bits both being set
to 1 but the SCS line is pulled high by the external master device before the SPI data
transfer is completely finished, the SIMICF bit will be set to 1 together with the TRF
bit. When this condition occurs, the corresponding interrupt will occur if the interrupt
function is enabled. However, the TRF bit will not be set to 1 if the SIMICF bit is set
to 1 by software application program.
• SIMC1 Register
Bit
Name
R/W
POR
7
HCF
R
1
6
HAAS
R
0
5
HBB
R
0
4
HTX
R/W
0
3
TXAK
R/W
0
2
SRW
R/W
0
1
IAMWU
R/W
0
0
RXAK
R
1
Bit 7
Bit 6
HCF: I²C Bus data transfer completion flag
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.
HAAS: I²C Bus data transfer completion flag
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.
Rev. 1.50
174
December 06, 2016