h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 643

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

21.3.2
ADCSR controls A/D conversion operations.
Bit
7
6
5
4
3
Bit Name
ADF
ADIE
ADST
SCAN
CKS
A/D Control/Status Register (ADCSR)
Initial Value
0
0
0
0
0
R/W
R/(W) *
R/W
R/W
R/W
R/W
Scan Mode
Description
A/D End Flag
A status flag that indicates the end of A/D conversion.
[Setting conditions]
[Clearing conditions]
A/D Interrupt Enable
Enables ADI interrupt by ADF when this bit is set to 1
A/D Start
Setting this bit to 1 starts A/D conversion. Clearing
this bit to 0 stops A/D conversion. In single mode, this
bit is cleared to 0 automatically when conversion on
the specified channel ends. In scan mode, conversion
continues sequentially on the specified channels until
this bit is cleared to 0 by software, a reset, or a
transition to standby mode or module stop mode.
Selects the A/D conversion operating mode. The
setting of this bit must be made when conversion is
halted (ADST = 0).
0: Single mode
1: Scan mode
Clock Select
Sets A/D conversion time. The input channel setting
must be made when conversion is halted (ADST = 0).
0: Conversion time is 266 states (max)
1: Conversion time is 134 states (max)
Switch conversion time while ADST is 0.
When A/D conversion ends in single mode
When A/D conversion ends on all channels
specified in scan mode
When 0 is written after reading ADF = 1
When DTC starts by an ADI interrupt and ADDR is
read
Rev. 3.00 Mar 21, 2006 page 589 of 788
Section 21 A/D Converter
REJ09B0300-0300