Datasheet

Section 16 A/D Converter (8 Analog Input Channel Version)
Rev.6.00 Sep. 27, 2007 Page 707 of 1268
REJ09B0220-0600
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 (Initial value)
1
• Single mode: A/D conversion is started. Cleared to 0 automatically when
conversion on the specified channel ends
• Scan mode: A/D conversion is started. Conversion continues sequentially on the
selected channels until ADST is cleared to 0 by software, a reset, or
a transition to standby mode or module stop mode
Bit 4—Scan Mode (SCAN): Selects single mode or scan mode as the A/D conversion operating
mode. See section 16.4, 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 (Initial value)
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).
ADCR3
CKS1
Bit 3
CKS Description
0 0 Conversion time = 530 states (max.)
1 Conversion time = 68 states (max.)
1 0 Conversion time = 266 states (max.) (Initial value)
1 Conversion time = 134 states (max.)
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).