M37480MX Datasheet, PDF (46/97 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

PRELIMINARY _{NSootimcee: pTahriasmisentroict} ^{alimfinitsalasrpeescuifbicjeactitotno. change.}
MITSUBISHI MICROCOMPUTERS
7480/7481 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
BUILT-IN PROGRAMMABLE ROM VERSIONS
M37480E8-XXXSP/FP, M37480E8T-XXXSP/FP, M37481E8-XXXSP/FP, M37481E8T-XXXSP/FP,
M37481E8SS
PIN DESCRIPTION
Table 5. Pin description
Pin
Mode
Name
Input/
output
Function
VCC, VSS
AVSS
(Note 1)
Single-chip/
EPROM
Power source
Apply a voltage of 2.7 to 5.5 V to VCC and 0 V to VSS and AVSS.
VREF
Single-chip
EPROM
Reference power
input
Mode input
Input
Input
Reference voltage input pin for A-D converter.
__
Used as CE input pin.
_____
RESET
Single-chip
EPROM
Reset input
Reset input
Input
Input
Reset input pin.
Connect to VSS.
XIN
XOUT
Single-chip/
EPROM
Single-chip/
EPROM
Clock input
Clock output
Input
Output
These are I/O pins of internal clock generating circuit for the main
clock. To control generating frequency, an external ceramic resona-
tor is connected between XIN and XOUT pins. If an external clock is
used, the clock oscillation source should be connected to the XIN
pin, and the XOUT pin should be left open. Feedback resistor is con-
nected between XIN and XOUT.
P00 – P07
Single-chip
I/O port P0
8-bit I/O port. The output structure is CMOS output.
I/O When this port is selected for input, a pull-up transistor can be con-
nected in units of 1 bit, and a key-on wake-up function is provided.
EPROM
Data I/O D0 – D7
I/O Data 8-bit (D0 to D7) I/O pins
P10 – P17
Single-chip
I/O port P1
8-bit I/O port. The output structure is CMOS output.
When this port is selected for input, a pull-up transistor can be con-
I/O nected in units of 4 bits. P12 and P13 are in common with timer
output pins T0 and T1. P14, P15, P_ 16__a_nd P17 are in common with
serial I/O pins RxD, TxD, SCLK and SRDY.
EPROM
Address input
A4 – A10
Input P11 to P17 are address (A4 to A10) input pins. Leave P10 open.
P20 – P27
(Note 2)
Single-chip
EPROM
Input port P2
Address input
A0 – A3
Input
Input
8-bit input port. This port is in common with analog input pins IN0 to
IN7 (IN0 to IN3 for the 7480 group).
P20 to P23 are address (A0 to A3) input pins. Leave P24 to P27
open.
P30 – P33
Single-chip
EPROM
Input port P3
Address input
A11, A12, mode
input, VPP input
Input
Input
4-bit input port. P30 and P31 are in common with external interrupt
input pins INT0 and INT1.
__
P30 and P31 are address (A11, A12) input pins. P32 is used for OE
input. P33 is VPP input. Apply VPP in the program and program
verify modes.
P40 – P43
(Note 3)
Single-chip
EPROM
I/O port P4
Address input
A13, A14
I/O
Input
4-bit I/O port. The output structure is N-channel open drain output,
having built-in clamp diode. P40 and P41 are in common with timer
input pins CNTR0 and CNTR1.
P40 and P41 are address (A13, A14) input pins. Leave P42 and P43
open.
P50 – P53
(Note 4)
Single-chip
EPROM
I/O port P5
Input port P5
I/O
Input
4-bit I/O port. The output structure is N-channel open drain output,
having a built-in clamp diode.
Leave these pins open.
Notes 1 : This is a dedicated pin for the 44P6N-A package in the 7481 group.
2 : Only 4 bits of P20 to P23 (IN0 to IN3) for the 7480 group.
3 : Only 2 bits of P40 and P41 for the 7480 group.
4 : This is a dedicated pin for the 7481 group.
46