UPD784021 datasheet(9/92 Pages) RENESAS

9 / 92 page

mPD784020, 784021

2. MAIN DIFFERENCES BETWEEN

mPD784026 AND m

mPD78234 SUB-SERIES

Series

mPD784026 sub-series

mPD78234 sub-series

Item

Number of basic instructions

113

(mnemonics)

Minimum instruction execution

160 ns

333 ns

time

(at 25 MHz)

(at 12 MHz)

Memory space (program/data)

1M byte in total

64K bytes/1M byte

Timer/counter

16-bit timer/counter

¥ 1

16-bit timer/counter

¥ 1

8/16-bit timer/counter

¥ 2

8-bit timer/counter

¥ 2

8/16-bit timer

¥ 1

8-bit timer

¥ 1

Clock output function

Available

Unavailable

Watchdog timer

Available

Unavailable

Serial interface

UART/IOE (3-wire serial I/O)

¥ 2 channels

UART

¥ 1 channel

CSI (3-wire serial I/O, SBI)

¥ 1 channel

CSI (3-wire serial I/O, SBI)

¥ 1 channel

Interrupt

Context switching

Available

Unavailable

Priority

4 levels

2 levels

Standby function

3 modes (HALT, STOP, IDLE)

2 modes (HALT, STOP)

Operation clock switching

Selectable from fXX/2, fXX/4, fXX/8, or fXX/16

Fixed to fXX/2

MODE pin

Unavailable

To specify ROM-less mode

functions

(always in the high level for the

mPD78233

mPD78237)

TEST pin

Pin for testing the device

Unavailable

Low level during ordinary use

Package

80-pin plastic QFP (14

¥ 14 mm)

80-pin plastic QFP (14

¥ 14 mm)

80-pin plastic TQFP (fine pitch)

94-pin plastic QFP (20

¥ 20 mm)

(12

¥ 12 mm): for the

mPD784021 only

84-pin plastic QFJ (1150

¥ 1150 mil)

80-pin ceramic WQFN (14

¥ 14 mm):

94-pin ceramic WQFN (20

¥ 20 mm):

for the

mPD78P4026 only

for the

mPD78P238 only

UPD784021 Datasheet(PDF) 9 Page - Renesas Technology Corp

UPD784021 Datasheet(HTML) 9 Page - Renesas Technology Corp

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