
8
EPSON
S1C88409 TECHNICAL MANUAL
CHAPTER 1: OUTLINE
Table 1.4.2 S1C88409 pin description (expanded 64K mode)
Pin name
VDD
VSS
VD1
AVDD
AGND
AVSS
AVREF
OSC1
OSC2
OSC3
OSC4
MCU/MPU
K00~K07
K10 (EXCL00)
K11 (EXCL01)
K12~K13
A00~A15
R20~R25
RD
WR
CE0
CE1 (R31)
CE2 (R32)
R40 (TOUT0/FOUT3)
R41 (TOUT1/FOUT1)
R42 (BZ)
D0~D7
P10 (SIN)
P11 (SOUT)
P12 (SCLK)
P13 (SRDY)
P14 (SIN/IRI)
P15 (SOUT/IRO)
P16 (SCLK)
P17 (SRDY)
P20 (BYH)
P21 (BYL)
P22 (BXH)
P23 (BXL)
P30~P35 (AD0~AD5)
P36, P37
(AD6/DA0, AD7/DA1)
LCDEN
DOFF
YD
FR
XSCL
LP
SD0~SD7
RESET
TEST
Function
Power supply (+) pin
Power supply (GND) pin
Voltage regulator output pin
Power supply (+) pin for analog circuit system
GND pin for analog circuit system
Power supply (GND) pin for analog circuit system
Reference voltage input pin for analog circuit system
OSC1 oscillation input pin (32 kHz crystal, CR oscillation, external clock input)
OSC1 oscillation output pin
OSC3 oscillation input pin (crystal/ceramic, CR oscillation, external clock input)
OSC3 oscillation output pin
MCU/MPU mode stting pin
Input port pin
Input port pin or external clock input pin for event counter (Timer 0)
Input port pin or external clock input pin for event counter (Timer 1)
Input port pin
Address bus
Output port pin
Read signal output pin
Write signal output pin
Chip enable signal output pin
Chip enable signal output pin or output port pin
Output port pin or TOUT0/FOUT3 clock output pin
Output port pin or TOUT1/FOUT1 clock output pin
Output port pin or buzzer signal output pin
Data bus
I/O port pin or serial I/F data input pin
I/O port pin or serial I/F data output pin
I/O port pin or serial I/F clock input/output pin
I/O port pin or serial I/F ready signal output pin
I/O port pin, serial I/F data input or IR receiver input pin
I/O port pin, serial I/F data output or IR transmitter output pin
I/O port pin or serial I/F clock input/output pin
I/O port pin or serial I/F ready signal output pin
I/O port pin or touch panel controller BYH signal output pin
I/O port pin or touch panel controller BYL signal output pin
I/O port pin or touch panel controller BXH signal output pin
I/O port pin or touch panel controller BXL signal output pin
I/O port pin or A/D converter analog signal input pin
I/O port pin, A/D converter analog signal input pin or D/A converter analog
signal output pin
LCD controller enable signal output pin
LCD controller forced blank signal output pin
LCD controller scan start pulse output pin
LCD controller frame signal output pin
LCD controller shift clock output pin
LCD controller latch pulse output pin
LCD controller data output pin
Initial reset input pin
Test input pin*1
Pin No.
44
50
47
24
27
25
26
49
48
46
45
51
52~59
60
61
62~63
73~88
89~94
95
96
97
98
99
100
1
2
65~72
3
4
5
6
7
8
9
10
11
12
13
14
23~18
17,16
43
42
41
40
39
38
37~30
64
15
I/O
–
O
–
I
O
I
O
I
O
I/O
O
I
1 TEST is the terminal used for factory inspection of the IC. For normal operation, be sure to connect the
TEST terminal to VDD.