CHAPTER 2 PIN FUNCTIONS
User’s Manual U16890EJ1V0UD
47
(3/4)
Pin No.
Pin Name
GC GF
I/O
Pull-up Resistor
Function
Alternate Function
KR0
37 39
P50/TI011/RTP00
KR1
38 40
P51/TI50/RTP01
KR2
39 41
P52/TO50/RTP02
KR3
40 42
P53/SIA0/RTP03
KR4
41 43
P54/SOA0/RTP04
KR5
42 44
P55/SCKA0/RTP05
KR6
43 45
P90/A0/TXD1
KR7
44 46
Input
Yes
Key return input
P91/A1/RXD1
NMI
17 19
Input
Yes
External interrupt input
(non-maskable, analog noise elimination)
P02
RD
67 69
Output
No
Read strobe signal output for external memory
PCT4
REGC
10 12
–
–
Connecting capacitor for regulator output
stabilization
–
RESET
14 16
Input
–
System reset input
–
RTP00
37 39
P50/TI011/KR0
RTP01
38 40
P51/TI50/KR1
RTP02
39 41
P52/TO50/KR2
RTP03
40 42
P53/SIA0/KR3
RTP04
41 43
P54/SOA0/KR4
RTP05
42 44
Output
Yes
Real-time output port
P55/SCKA0/KR5
RXD0
26 28
Serial receive data input for UART0
P31
RXD1
44 46
Input
Yes
Serial receive data input for UART1
P91/A1/KR7
SCK00
24 26
P42
SCK01
52 54
P99/A9
SCKA0
42 44
P55/RTP05/KR5
SCKA1
55 57
I/O
Yes
Serial clock I/O for CSI00, CSI01, CSIA0,
CSIA1
N-ch open-drain output can be specified in 1-
bit units.
P912/A12
SCL0
Note 1
36 38
I/O
No
Note 2
Serial clock I/O for I
Fixed to N-ch open-drain output
2
C0
P39
SDA0
Note 1
35 37
I/O
No
Note 2
Serial transmit/receive data I/O for I
Fixed to N-ch open-drain output
2
C0
P38
SI00
22 24
Serial receive data input for CSI00
P40
SI01
50 52
Serial receive data input for CSI01
P97/A7
SIA0
40 42
Serial receive data input for CSIA0
P53/RTP03/KR3
SIA1
53 55
Input
Yes
Serial receive data input for CSIA1
P910/A10
SO00
23 25
P41
SO01
54 56
P98/A8
SOA0
41 43
P54/RTP04/KR4
SOA1
55 57
Output
Yes
Serial transmit data output for CSI00, CSI01,
CSIA0, CSIA1
N-ch open-drain output can be specified in 1-
bit units.
P911/A11
Notes 1.
Only in products with an I
2.
An on-chip pull-up resistor can be provided by a mask option (only in the mask ROM versions).
Remark
GC: 100-pin plastic LQFP (fine pitch) (14
×
14)
GF: 100-pin plastic QFP (14
×
20)
2
C bus (Y products)