HD643303x Hitachi, HD643303x Datasheet - Page 394

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

12.2.3 A/D Control Register (ADCR)
ADCR is an 8-bit readable/writable register that enables or disables external triggering of A/D
conversion. ADCR is initialized to H'7F by a reset and in standby mode.
Bit 7—Trigger Enable (TRGE): Enables or disables external triggering of A/D conversion.
Bit 7
TRGE
0
1
Bits 6 to 0—Reserved: Read-only bits, always read as 1.
Bit
Initial value
Read/Write
A/D conversion cannot be externally triggered
A/D conversion starts at the falling edge of the external trigger signal (ADTRG)
Description
Trigger enable
Enables or disables external triggering of A/D conversion
TRGE
R/W
7
0
—
—
6
1
—
—
5
1
379
—
—
4
1
Reserved bits
—
—
3
1
—
—
2
1
—
—
1
1
(Initial value)
—
—
0
1