Holtek HT68F Series Manual page 216

• HT68F30/HT68F40/HT68F50/HT68F60
Bit 7
Name D7
R/W R/W
POR 0
Bit 7 Reserved Bit
0: Correct level – bit must be reset to zero for correct operation
1: Unpredictable operation – bit must not be set high
Bit 6~5 ISEL1, ISEL0: Select SCOM typical bias current (V
00: 25μA
01: 50μA
10: 100μA
11: 200μA
Bit 4 SCOMEN: SCOM module control
0: Disable
1: Enable
COM3EN: PC7 or SCOM3 selection
Bit 3
0: GPIO
1: SCOM3
Bit 2 COM2EN: PC6 or SCOM2 selection
0: GPIO
1: SCOM2
Bit 1 COM1EN: PC1 or SCOM1 selection
0: GPIO
1: SCOM1
Bit 0 COM0EN: PC0 or SCOM0 selection
0: GPIO
1: SCOM0
Rev. 2.10
HT68F20/HT68F30/HT68F40/HT68F50/HT68F60
HT68FU30/HT68FU40/HT68FU50/HT68FU60
Enhanced I/O Flash Type 8-Bit MCU with EEPROM
6 5 4
ISEL1 ISEL0 SCOMEN COM3EN COM2EN COM1EN COM0EN
R/W R/W R/W
0 0 0
216
3 2 1
R/W R/W R/W
0 0 0
=5V)
DD
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0
R/W
0