Holtek HT67F2350 Manual page 170

• SADC0 Register – HT67F2360/HT67F2370/HT67F2390
Bit 7
Name START
R/W R/W
POR 0
START: Start the A/D Conversion
Bit 7
0→1→0: Start
This bit is used to initiate an A/D conversion process. The bit is normally low but if set
high and then cleared low again, the A/D converter will initiate a conversion process.
Bit 6 ADBZ: A/D Converter busy flag
0: No A/D conversion is in progress
1: A/D conversion is in progress
This read only flag is used to indicate whether the A/D conversion is in progress or
not. When the START bit is set from low to high and then to low again, the ADBZ flag
will be set to 1 to indicate that the A/D conversion is initiated. The ADBZ flag will be
cleared to 0 after the A/D conversion is complete.
Bit 5 ADCEN: A/D Converter function enable control
0: Disable
1: Enable
This bit controls the A/D internal function. This bit should be set to one to enable
the A/D converter. If the bit is set low, then the A/D converter will be switched off
reducing the device power consumption. When the A/D converter function is disabled,
the contents of the A/D data register pair known as SADOH and SADOL will be
unchanged.
Bit 4 ADRFS: A/D conversion data format select
0: A/D converter data format → SADOH=D [11:4]; SADOL=D [3:0]
1: A/D converter data format → SADOH=D [11:8]; SADOL=D [7:0]
This bit controls the format of the 12-bit converted A/D value in the two A/D data
registers. Details are provided in the A/D converter data register section.
Bit 3~0 SACS3~SACS0: A/D converter external analog input channel select
0000: External AN0 input
0001: External AN1 input
0010: External AN2 input
0011: External AN3 input
0100: External AN4 input
0101: External AN5 input
0110: External AN6 input
0111: External AN7 input
1000: External AN8 input
1001: External AN9 input
1010: External AN10 input
1011: External AN11 input
1100: External AN12 input
1101: External AN13 input
1110: External AN14 input
1111: External AN15 input
These bits are used to select which external analog input channel is to be converted.
When the external analog input channel is selected, the SAINS bit field must set to
"0000", "0100" or "11xx". Details are summarized in the "A/D Converter Input Signal
Selection" table.
Rev. 1.60
Advanced A/D Flash MCU with LCD & EEPROM
6 5 4
ADBZ ADCEN ADRFS
R R/W R/W
0 0 0
170
HT67F2350/HT67F2360
HT67F2370/HT67F2390
3 2 1
SACS3 SACS2 SACS1
R/W R/W R/W
0 0 0
May 16, 2019
0
SACS0
R/W
0