Hitachi H8S/2338 Series Hardware Manual page 521

Bit 5—A/D Start (ADST): Selects starting or stopping of A/D conversion. Holds a value of 1
during A/D conversion.
The ADST bit can be set to 1 by software, a timer conversion start trigger, or the A/D external
trigger input pin (ADTRG).
Bit 5
ADST Description
•
0
A/D conversion stopped
•
1
Single mode: A/D conversion is started. Cleared to 0 automatically when
•
Scan mode: A/D conversion is started. Conversion continues sequentially on the
Bit 4—Scan Mode (SCAN): Selects single mode or scan mode as the A/D conversion operating
mode. See section 14.4, Operation, for details of single mode and scan mode operation. Only set
the SCAN bit while conversion is stopped (ADST = 0).
Bit 4
SCAN Description
0 Single mode
1 Scan mode
Bit 3—Clock Select (CKS): Used together with the CKS1 bit in ADCR to set the A/D
conversion time. Only change the conversion time while conversion is stopped (ADST = 0).
ADCR Bit 3 Bit 3
CKS1 CKS
0 0
1
1 0
1
Bits 2 to 0—Channel Select 2 to 0 (CH2 to CH0): These bits are used together with the SCAN
bit to select the analog input channels.
Only set the input channel(s) while conversion is stopped (ADST = 0).
conversion on the specified channel ends
selected channels until ADST is cleared to 0 by software, a reset, or
a transition to standby mode or module stop mode
Description
Conversion time = 530 states (max.)
Conversion time = 68 states (max.)
Conversion time = 266 states (max.)
Conversion time = 134 states (max.)
(Initial value)
(Initial value)
(Initial value)
513