3826OTP Datasheet, PDF (39/91 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

3826 Group (One Time PROM version)
•10-bit reading
(Read address 003516, then 001416)
b7
b0
b9 b8 b7 b6 b5 b4 b3 b2 (high-order)
AD conversion high-order register
(ADH: Address 003516)
b7
b0
AD conversion low-order register
(ADL: Address 001416)
b1 b0
(low-order)
Conversion mode selection bit
0 : 10-bit A/D mode
1 : 8-bit A/D mode
Note : Bits 0 to 5 of address 001416 become “0” at reading.
•8-bit reading
(Read only address 003516)
AD conversion high-order register
b7
b0
b7 b6 b5 b4 b3 b2 b1 b0
Fig. 39 Read of AD conversion register
Data
bus
b
AD control register ⁷
P57/ADT/DA2
3
P60/SIN2/AN0
P61/SOUT2/AN1
P62/SCLK21/AN2
P63/SCLK22/AN3
P64/AN4
P65/AN5
P66/AN6
P67/AN7
Comparator
b
0
A/D control circuit
ADT/A/D
interrupt
request
AD conversion
high-order register
(Address 003516)
AD conversion
low-order register
8
(Address 001416)
Resistor ladder
AVSS VRE
Fig. 40 A/D converter block diagram
Rev.1.00 Sep 06, 2006 page 39 of 88
REJ03B0181-0100