h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 753

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

22.3.2
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
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. 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.
Scan Mode
Selects the A/D conversion operating mode.
0: Single mode
1: Scan mode
Clock Select
Sets A/D conversion time.
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 Jan 25, 2006 page 701 of 872
Section 22 A/D Converter
REJ09B0286-0300