tmp89fh40 TOSHIBA Semiconductor CORPORATION, tmp89fh40 Datasheet - Page 317

• Manufacturer Part Number: tmp89fh40
• Description: 8 Bit Microcontroller Tlcs-870/c1 Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

RA002
20. 10-bit AD Converter (ADC)
20.1
converter, a sample-hold circuit, a comparator, a successive comparison circuit, etc.
Note 1: Before using the AD converter, set an appropriate value to the I/O port register which is also used as an analog input port.
Note 2: The DA converter current (IREF) is automatically cut off at times other than during AD conversion.
The TMP89FH40 has a 10-bit successive approximation type AD converter.
The circuit configuration of the 10-bit AD converter is shown in Figure 20-1.
It consists of control registers ADCCR1 and ADCCR2, converted value registers ADCDRL and ADCDRH, a DA
Configuration
VAREF
AVDD
AIN0
AIN7
For details, see the section on "I/O ports".
SAIN
Input selector
4
n
A
S EN
Y
AINEN
AD converter control registers 1 and 2
Figure 20-1 10-bit AD Converter
ADCCR1
AMD
2
Sample-hold
circuit
R/2
Control circuit
R
Page 303
ADCCR2
Analog
comparator
ACK
3
Shift clock
DA converter
Reference
voltage
AD converted value registers 1 and 2
approximation circuit
ADCDRL
Successive
R/2
10
10
8
AVSS
ADCDRH
2
INTADC
TMP89FH40