Notes On Use; Other Considerations - Fujitsu F2MC-16LX MB90580 Series Hardware Manual

16.5 Notes on use

16.5 Notes on use
To start the A/D converter upon an external trigger or internal timer, A/D activation factor bits STS1 and
STS0 of the ADCS2 register are used. Ensure that the input values of the external trigger or internal
timer are inactive. If the values are active, A/D conversion may start immediately.
When setting STS1 and STS0, ensure that '1' (input) is specified for ADTG and '0' (output) is specified
for the internal timer (timer 2).

16.5.1 Other considerations

Always write '1' to the ADER bit corresponding to a pin used as analog input.
Analog input enable register
Bit
Address: 00001C
H
Read/write
Initial value
Port 5 pins are controlled as described below.
0: Port input mode
1: Analog input mode
'1' is set upon a reset.
234 Chapter 16: A/D Converter
15 14 13
ADE7 ADE6 ADE5
R/W R/W R/W
(1) (1)
(1)
12 11 10
ADE4 ADE3 ADE2
R/W
R/W R/W
(1) (1) (1)
9 8
ADER
ADE1 ADE0
R/W R/W
(1) (1)
MB90580 Series