Microcomputer
V Series
s
16-Bit (2/2)
Type number
Alias
Features
V20HL/30HL + Peripheral control unit
Each product is a microcomputer with
a CPU core comprising
NEC’s “V20HL/V30HL” and peripheral
circuits compatible with PC/XT
TM
• EMS Ver 4.0 support circuit
• DMA control unit (equivalent to
µ
PD71037)
• Interrupt control unit (equivalent to
µ
PD71059)
• Timer/counter unit (equivalent to
µ
PD71037)
• Keyboard control unit
• Memory control unit
• External I/O decoder
• ROM decoder
Software compatible with V20/30/25/
35
• 16 general purpose register banks
(512-byte internal RAM)
Following various peripheral features
for mechanical control
• Multi-mode interrupt controller
(Vectored/Register bank switching/
Macro service)
• 2 real time output ports for
controlling stepping moters
• 8-bit A/D converter with 4 inputs
• 2 DMA controllers with intelligent
modes
• 5 16-bit timer/counters
• 2 asynchronous/synchronous serial
controllers
• 8-bit parallel interface
• Watchdog timer
• MH/MR codec instructions
Software compatible with V20/V30.
Following additional peripheral
features including RAM:
• 2-ch DMA controller
• 2-ch serial controller
• 2-ch 16-bit timer/counter
• Interrupt controller
• 24 general purpose I/O port pins
• 8 general purpose register banks
• RAM 256B
Internal bus
External bus
Real memory
space
Operating
frequency
Package
µ
PD70270
V41
TM
16 bits
8 bits
16M bytes
16 MHz
• 160-pin QFP
µ
PD70280
V51
TM
16 bits
16 bits
µ
PD70433
V55PI
TM
16 bits
8/16 bits
(Selectable)
16M bytes
12.5/16 MHz
• 120-pin QFP
0.8 or 0.5
mm pin pitch
• 132-pin PGA
(
)
µ
PD70320
V25
TM
16 bits
8 bits
1M bytes
8 MHz
• 84-pin QFJ
• 94-pin QFP
µ
PD70330
V35
TM
16 bits
16 bits
µ
PD79011
µ
PD79021
µ
PD70325
µ
PD70335
V25HS
TM
CPU with built-in RTOS (internal
ROM of V25/ V35 to which real-time
V35HS
TM
OS is transplanted)
V25+
TM
V35+
TM
16 bits
16 bits
16 bits
16 bits
8 bits
1M bytes
16 bits
8 bits
16 bits
1M bytes
8/10 MHz
8 MHz
• 84-pin QFJ
• 94-pin QFP
High speed version of V25/ V35
DMA transfer function
• 84-pin QFJ
• 94-pin QFP
56
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