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Chapter 2
Pin Functions
Preliminary User’s Manual U17566EE1V2UM00
Pin configuration
To define the function and the electrical characteristics of a pin, several control
registers are provided.
• For a general description of the registers, see
“Port Group Configuration
Registers“ on page 40
.
• For every port, detailed information on the configuration registers is given in
“Port Group Configuration“ on page 56
.
There are three types of control circuits, defined as port types. For a
description of the port types, see
“Port Types Diagrams“ on page 52
.
8
8-bit input/output
•
Clocked Serial Interface CSIB2 data/clock line
(µPD70F3424, µPD70F3425, µPD70F3426,
µPD70F3427 only)
•
LCD controller segment signal output
(µPD70(F)3420, µPD70(F)3421, µPD70(F)3422,
µPD70F3423 only)
•
Frequency output
•
UARTA0 transmit/receive data
9
8-bit input/output
•
LCD Bus I/F data lines
•
LCD controller segment/common signal output
(µPD70(F)3420, µPD70(F)3421, µPD70(F)3422,
µPD70F3423 only)
10
8-bit input/output
•
Timer TMP0 to TMP3 channels
•
LCD Bus I/F read/write strobe
•
LCD controller segment signal output
(µPD70(F)3420, µPD70(F)3421, µPD70(F)3422,
µPD70F3423 only)
•
Clocked Serial Interface CSIB0 data/clock line
11
8-bit input/output
•
Stepper Motor Controller/Driver outputs
12
8-bit input/output
•
Stepper Motor Controller/Driver outputs
13
8-bit input/output
•
Stepper Motor Controller/Driver outputs
•
Timer TMG0 to TMG1 channels
14
3-bit input/output
External memory interface (µPD70F3427 only):
•
Bus clock
•
Byte enable 2, 3
MEM-I/F
–
External memory interface (µPD70F3427 only):
•
Address lines 0 to 23
•
Chip selects 0, 1, 3, 4
•
Read/write strobe
•
Data wait request
•
Byte enable 0, 1
•
Data lines 0 to 31
Table 2-1
Functions of each port group (2/2)
Port
group
name
Function
Port mode
Alternative mode
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