38K2 Datasheet, PDF (112/151 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

38K2 Group
Table 12 Description of pin function (Standard Serial I/O Mode)
Pin name
Signal name
I/O Function
VCC,VSS
Power supply
Apply 3.00 to 5.25 V (L version) to the Vcc pin and 0 V to the Vss pin.
VCCE
Power supply
Connect this pin to Vcc.
CNVSS
VPP
I
Connect this pin to VPP (VPP = 4.50 to 5.25 V).
CNVSS2
CNVSS2
I
Connect this pin to Vss.
VREF
Analog reference voltage
I
Connect this pin to Vcc when not using.
DVCC, PVCC Analog power supply
Connect this pin to Vcc.
PVSS
RESET
XIN
XOUT
Analog power supply
Reset input
Clock input
Clock output
Connect this pin to Vss.
I
To reset, input “L” level for 20 cycles or longer clocks of φ.
I
Connect a ceramic or crystal resonator between the XIN and XOUT pins. When
O entering an externally drived clock, enter it from XIN and leave XOUT open.
USBVREF
USB reference voltage input
I
Connect this pin to Vcc when not using.
TrON
USB reference voltage output O Leave this pin open when not using.
D0+,D0-
USB upstream input
I/O Input “L” level when not using.
D1+,D1-
USB downstream input
I/O Input “L” level when not using.
D2+,D2-
USB downstream input
I/O Input “L” level when not using.
P00 to P07
Input port P0
I
Input “L” or “H” level, or keep open.
P10 to P15
Input port P1
I
Input “L” or “H” level, or keep open.
P16
Input port P1
I
Input “L” or “H” level, or keep open.Input “H” level only at release of reset.
P17
Input port P1
I
Input “L” or “H” level, or keep open.
P20 to P24
Input port P2
I
Input “L” or “H” level, or keep open.
P30 to P37
Input port P3
I
Input “L” or “H” level, or keep open.
P40
RxD input
I
This is a serial data input pin.
P41
TxD output
O This is a serial data output pin.
P42
SCLK input
I
This is a serial clock input pin.Input “H” level only at release of reset.
P43
BUSY output
O This is a BUSY output pin.
P50 to P57
Input port P5
I
Input “L” or “H” level, or keep open.
P60 to P63
Input port P6
I
Input “L” or “H” level, or keep open.
Rev.3.00 Oct 15, 2006 page 112 of 147
REJ03B0193-0300