22 BASIC EXTERNAL CONNECTION DIAGRAM
S1C17M20/M21/M22/M23/M24/M25
Seiko Epson Corporation
22-1
TECHNICAL MANUAL (Rev. 1.0)
22 Basic External Connection Diagram
External
voltage
BZOUT
EXSVD0
Pxy
SDIn
SDOn
SPICLKn
#SPISSn
SCL0
SDA0
USINn
USOUTn
TOUTn0/CAPn0
TOUTn1/CAPn1
ADIN0x
#ADTRG0
VREFA0
SENBn
SENAn
REFn
RFINn
DCLK
DSIO
DST2
V
PP
V
DD
V
D1
OSC1
OSC2
OSC3
OSC4
#RESET
V
SS
R
DBG
ICDmini
I/O
SPI
I
2
C
UART
PWM/Capture
V
DD
C
PW2
C
PW1
+
S1C17M20/M21/M22/
M23/M24/M25
[The potential of the substrate
(back of the chip) is V
SS
.]
C
D1
C
G1
(
)
( )
X'tal1
C
D3
C
G3
( )
( )
X'tal3/
Ceramic
R
TMP2
R
TMP1
R
REF
C
REF
(
)
( )
BZ
V
DD
C
VPP
REMO
V
DD
IR transmitter module
A/D conversion inputs
C
VREFA
1.8–5.5 V,
2.4–5.5 V
∗
1
,
or
2.7–5.5 V
∗
2
∗
4
∗
5
∗
3
*
1: For Flash programming (when V
PP
is supplied externally)
*
2: For Flash programming (when V
PP
is generated internally)
*
3: When the OSC1 crystal oscillator is used (except for the S1C17M20/M23 (24-pin package))
*
4: When the OSC3 crystal/ceramic oscillator is used (except for the S1C17M20/M23 (24-pin package))
*
5: When the R/F converter is used (available in the S1C17M22/M25)
( ): Do not mount components if unnecessary.