1 OVERVIEW
S1C33L26 TECHNICAL MANUAL
Seiko Epson Corporation
1-19
No.
Pin name
I/O
Description
Pin No.
PWR
DC characteristics
TQFP15
128
TQFP24
144
PFBGA
180
Input
Output
PU/PD
5 DST0
i/
O
(H)
DST0 signal output for debugging (default)
15
17
G1
P2
LVCMOS
Schmitt
Type 2 100k PUc
(dis)
P15
i/o I/O port
FPDAT13
o LCD data output
6 DPCO
i/
O
(H)
DPCO signal output for debugging (de-
fault)
17
19
G3
P17
i/o I/O port
FPDAT15
o LCD data output
3.2.7 List of Other Pins
Table 1.
No.
Pin name
I/O
Description
Pin No.
PWR
DC characteristics
TQFP15
128
TQFP24
144
PFBGA
180
Input
Output
PU/PD
1 #RESET
I Reset input
26
30
L1
P2
LVCMOS
Schmitt
–
50k PU
2 #NMI
I NMI request input
27
31
L2
3 BOOT
I Boot mode select signal input
6
6
D2
LVCMOS
Schmitt
–
–
4 WAKEUP
O
(X)
C33 wakeup signal output from RTC
–
41
M3
P3
–
Type 1
–
5 #STBY
I C33 standby input (except for RTC)
37
42
M4
P3
LVCMOS
Schmitt
–
–
6 TEST
I Test input. Connect to V
SS
in user mode.
7
7
D1
P1
LVCMOS
–
120k PD
7 VCP
O
(H)
Test output
46
51
N7
P5
–
–
–
3.2.8 USI Pin Configuration
Table 1.
Pin name
Function by interface mode
UART
SPI master
SPI slave
I
2
C master
I
2
C slave
USI_DI
Data input
(uart_rx)
Data input
(spi_di)
Data input
(spi_di)
Data input/output
(i2c_sda)
Data input/output
(i2c_sda)
USI_DO
Data output
(uart_tx)
Data output
(spi_do)
Data output (spi_do)
when #spi_ss = 0
Unused
(output)
Unused
(output)
Hi-Z when #spi_ss = 1
USI_CK
Unused
(input)
Clock output
(spi_ck)
Clock input
(spi_ck)
Clock input/output
(i2c_sck)
Clock input/output
(i2c_sck)
USI_CS
Unused
(input)
Unused
(input)
Slave select input
(#spi_ss)
Data input/output
(i2c_sda)
Data input/output
(i2c_sda)
Note: In I
2
C mode, both the USI_DI and USI_CS pins can be configured as I
2
C data input/output pins.
However, they can not be used for I
2
C data input/output at the same time.
3.2.9 USIL Pin Configuration
Table 1.
Pin name
Function by interface mode
UART
SPI master
SPI slave
I
2
C master
I
2
C slave
LCD Parallel
LCD SPI
USIL_DI
Data input
(uart_rx)
Data input
(spi_di)
Data input
(spi_di)
Data input/
output (i2c_sda)
Data input/
output (i2c_sda)
A0 (command/
data select
signal) output
(lcdp_a0)
A0 (command/
data select
signal) output
(lcds_a0)
USIL_DO
Data output
(uart_tx)
Data output
(spi_do)
Data output
(spi_do) when
#spi_ss = 0
Unused
(output)
Unused
(output)
Write signal
output (lcdp_wr)
Data output
(lcds_do)
Hi-Z when
#spi_ss = 1
USIL_CK
Unused
(input)
Clock output
(spi_ck)
Clock input
(spi_ck)
Clock input/
output (i2c_sck)
Clock input/
output (i2c_sck)
Read signal
output
(lcdp_rd)
Clock output
(lcds_ck)
USIL_CS
Unused
(input)
Unused
(input)
Slave select
input (#spi_ss)
Data input/
output (i2c_sda)
Data input/
output (i2c_sda)
Chip select
signal output
(lcdp_cs)
Unused
(input)
LCD_D[7:0]
Unused
(input)
Unused
(input)
Unused
(input)
Unused
(input)
Unused
(input)
8-bit data
input/output
Unused
(input)
Note: In I
2
C mode, both the USIL_DI and USIL_CS pins can be configured as I
2
C data input/output
pins. However, they can not be used for I
2
C data input/output at the same time.