Precautions When Using The 8/10-Bit A/D Converter - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 19 8/10-BIT A/D CONVERTER

19.5 Precautions When Using the 8/10-bit A/D Converter

This section explains precautions required when the 8/10-bit A/D converter is used.
I Start by external trigger/internal trigger
Whether to start the A/D converter by an external trigger or the internal timer is specified using
the STS1 and STS0 A/D startup source bits of the ADCS2 Register. Specify the input values of
the external trigger and internal timer only in the inactive state.
Making these setting in the active state will sometimes cause an immediate start of operation.
When STS1 and STS0 are set, perform conversion with ADTG = 1 input and internal timer
(PPG1) = 0 output.
I Handling of analog input pins
Be sure to set the ADER bits corresponding to the pins used in analog input to "1".
Address: 00001F
The settings for pin control of the pins of Port 6 are as follows:
• 0: Port input/output mode
• 1: Analog input mode
At reset, "1" will be set.
376
bit
7 6 5
ADE7 ADE6 ADE5 ADE4 ADE3 ADE2 ADE1 ADE0 11111111
H
R/W R/W R/W R/W R/W
4 3 2 1
R/W R/W R/W
0 Initial value
B