4509 Datasheet, PDF (73/142 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4509 Group
A/D control register Q1
Q13 A/D operation mode selection bit
Q12
Q11 Analog input pin selection bits
Q10
at reset : 00002
at RAM back-up : state retained
0
A/D conversion mode
1
Comparator mode
Q12 Q11 Q10
0 0 0 AIN0
0 0 1 AIN1
0 1 0 AIN2
0 1 1 AIN3
1 0 0 AIN4
1 0 1 AIN5
1 1 0 Not available
1 1 1 Not available
Selected pins
R/W
TAQ1/TQ1A
Serial interface control register J1
at reset : 00002
at RAM back-up : state retained
J13
Serial interface synchronous clock
selection bits
J12
J13 J12
00
01
10
Synchronous clock
Instruction clock (INSTCK) divided by 8
Instruction clock (INSTCK) divided by 4
Instruction clock (INSTCK) divided by 2
1 1 External clock (SCK input)
J11 J10
Port function
J11
0 0 P00, P01, P02 selected/SIN, SOUT, SCK not selected
Serial interface port function selection bits ^{0 1 P00, SOUT, SCK selected/SIN, P01, P02 not selected}
J10
1 0 SIN, P01, SCK selected/P00, SOUT, P02 not selected
1 1 SIN, SOUT, SCK selected/P00, P01, P02 not selected
Notes 1: “R” represents read enabled, and “W” represents write enabled.
R/W
TAJ1/TJ1A
Rev.1.02 2006.12.22 page 73 of 140
REJ03B0147-0102