UPD705100GJ-100-8 NEC [NEC], UPD705100GJ-100-8 Datasheet - Page 7

• Manufacturer Part Number: UPD705100GJ-100-8
• Description: V830TM 32-BIT MICROCONTROLLER
• Manufacturer: NEC [NEC]

1. PIN FUNCTIONS
1.1 Pin Functions
A2-A27
A28-A31/CS0-CS3
D0-D31
BE0, BE1
BE2/BH
BE3/A1
ST0-ST3
BCYST
R/W
READY
HLDRQ
HLDAK
SIZ16B
NMI
INT
INTV0-INTV3
BCLK
CMODE
ASEL
RESET
V
GND
Note When used for a chip select signal, this is held at the high level.
DD
Pin name
Note
Tristate output
Tristate input/output
Tristate output
Input
Output
Input
-
Input/output
Address bus
Address bus/chip select
Bidirectional data bus
Indicates which data bus can be used
for data access.
Indicates access to D16-D23/byte or
halfword access.
Indicates most significant byte access/A1
address.
Indicates the status of a bus.
Indicates the start of a bus cycle.
Indicates whether the bus cycle is
a read or write cycle.
Terminates a bus cycle.
Requests bus mastership.
Response to HLDRQ
Fixes the bus width to 16 bits.
Nonmaskable interrupt request
Maskable interrupt request
Indicates an interrupt level.
Bus clock input
Specifies the frequency ratio for the
external bus and the internal circuit.
Selects A28-A31/CS0-CS3.
Resets the internal state.
Supplies positive power.
Ground potential
Function
Hi-Z
Hi-Z/H
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Hi-Z
-
-
L
-
-
-
-
-
-
-
-
-
-
At hold
PD705100
-
-
H
H
Hi-Z
H
H
H
0101
H
H
-
-
H
-
-
-
-
-
-
-
-
At reset
7