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UPD7554AGA Datasheet

  • UPD7554AGA

  • 4-BIT SINGLE-CHIP MICROCOMPUTER

  • 64頁(yè)

  • NEC   NEC

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DATA SHEET
MOS INTEGRATED CIRCUIT
碌
PD7554A, 7554A(A)
4-BIT SINGLE-CHIP MICROCOMPUTER
DESCRIPTION
The
碌
PD7554A is a product of the
碌
PD7554, 7564 sub-series which is a 4-bit single-chip microcomputer with a
small number of ports in a small package, which is enabled to operate even at the super-low voltage of 2.0 V so
that it is optimized for handy-type systems operating with dry cells. The
碌
PD7554A is a low-order model in the
碌
PD7500 series (
碌
PD7554A only).
This device incorporates a serial interface, and serves as the sub-CPU for a high-order model of that series or
the 8-bit microcomputer. It is optimized for distributed processing of the system.
The
碌
PD7554A has outputs to directly drive a triac and LEDs and allows selection among many types of input/
output circuits using their respective mask options, sharply reducing the number of external circuits required.
Details of functions are described in the User鈥檚 Manual shown below. Be sure to read in design.
碌
PD7554, 7564 User鈥檚 Manual: IEM-1111D
FEATURES
鈥?/div>
Range of supply voltage 7554A
: 2.0 to 6.0 V
7554A(A) : 2.7 to 6.0 V
鈥?/div>
Drive with two 1.5 V manganese cells
鈥?/div>
47 types of instructions
(Subset of
碌
PD7500H SET B)
鈥?/div>
Instruction cycle
External clock : 2.86
碌
s (in operation at 700 kHz, 5 V)
RC oscillation : 4
碌
s (in operation at 500 kHz, 5 V)
鈥?/div>
Program memory (ROM) capacity: 1024
脳
8 bits
鈥?/div>
Data memory (RAM) capacity: 64
脳
4 bits
鈥?/div>
Test source: One external source and two internal
sources
鈥?/div>
8-bit timer/event counter
鈥?/div>
16 I/O lines (Total output current of all pins: 100 mA)
鈥?Can directly drive a triac and a LED: P80 to P83
鈥?Can directly drive LEDs: P100 to P103 and P110
to P113
鈥?Mask option function provided for every port
鈥?/div>
8-bit serial interface
鈥?/div>
Standby (STOP/HALT) function
鈥?/div>
Low supply voltage data retaining function for data
memory
鈥?/div>
Built-in ceramic oscillator for system clock RC
Oscillation with an external resistor R (Incorporat-
ing capacitor C)
5
APPLICATION
碌
PD7554A
: Sub-CPU including handy-type system, PPC, printer, VCR, audio equipments, etc.
碌
PD7554A(A) : Automotive and transportation equipments, etc.
The quality level and absolute maximum ratings of the
碌
PD7554A and the
碌
PD7554A(A) differ.
Except where specifically noted, explanations here concern the
碌
PD7554A as a representative product.
If you are using the
碌
PD7554A(A), use the information presented here after checking the functional differences.
5
The information in this document is subject to change without notice.
Document No. IC-2419C
(O. D. No. IC-7835C)
Date Published January 1995 P
Printed in Japan
The mark
5
shows major revised points.
漏
1994
1989

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