UPD30121 NEC [NEC], UPD30121 Datasheet - Page 21

• Manufacturer Part Number: UPD30121
• Description: VR4121TM 64-/32-BIT MICROPROCESSOR
• Manufacturer: NEC [NEC]

1.3 Recommended Connection and I/O Circuit Types
ADD25/SCLK
ADD (0:24)
DATA (0:15)
DATA (16:31)/
GPIO (16:31)
LCDCS#
RD#
WR#
LCDRDY
ROMCS (2:3)#
ROMCS (0:1)#
UUCAS#/MRAS3#
ULCAS#/MRAS2#
MRAS (0:1)#
UCAS#
LCAS#
BUSCLK
SHB#
IOR#
IOW#
MEMR#
MEMW#
ZWS#
RSTOUT
IOCS16#
MEMCS16#
IOCHRDY
Notes 1. Pins DATA (16:31)/GPIO (16:31) in the V
Remarks 1. No specification ( ) in the External Processing column indicates that the external processing is
Pin Name
2. When the bus hold function is used, external pull-up is recommended for the V
3. Do not input an intermediate-level signal.
4. When used as the RAS signal of extended DRAM, external pull-up is recommended for the V
5. When the MPOWER pin outputs the low-level, intermediate-level input is enabled.
data bus. When using these pins as GPIO (16:31) signals, pull them up or pull down so as not to input
an intermediate-level signal.
2. No specification ( ) in the Recommended Connection of Unused Pins column indicates that the pin
unnecessary.
is always connected.
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Slew rate buffer
Processing
Internal
Note 5
Note 5
Note 5
Note 5
Processing
External
Note 1
Note 2
Note 2
Note 3
Note 4
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 3
Pull up
Note 3
Note 3
Note 3
Data Sheet U14691EJ1V0DS00
R
4121 function as GPIO (16:31) signals when using the 16-bit
Capability
120 pF
120 pF
120 pF
120 pF
120 pF
120 pF
120 pF
120 pF
40 pF
40 pF
40 pF
40 pF
40 pF
40 pF
40 pF
40 pF
40 pF
40 pF
40 pF
40 pF
40 pF
Drive
I/O Circuit
Type
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
R
4121.
Connect to V
GND via resistor
Connect to GND
Connect to GND
Recommended
Connect to V
Connect to V
Connect to V
Connection of
Unused Pins
PD30121
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
Leave open
R
4121.
DD
DD
DD
DD
(1/3)
or
21