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* This specification are subject to be changed without notice.
6.11.1998
EM73400
4-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT
GENERAL DESCRIPTION
EM73400 is an advanced single chip CMOS 4-bit micro-controller. It contains 4K-byte ROM, 244-nibble RAM,
4-bit ALU, 13-level subroutine nesting, 22-stage time base, two independent 12-bit timer/counter and one data
pointer (DP) for the kernel function, and the EM73400 also contains 6 interrupt sources, 10 I/O ports (including
2 output ports for LED driving , 2 input ports and 6 ports for bidirection I/O) and a serial bidirection interface
(SIO).
Except low-power consumption and high speed, EM73400 also has sleep and hold mode operation for power
saving.
EM73400 is suitable for application in telecom products, family appliance, consumer products and toy
controller.
FEATURES
Operation voltage
: 4.5V to 5.5V (clock frequency : 32 KHz to 5 MHz)
2.4 to 5.5V (clock frequency : 32 KHz to 4.19 MHz)
: Single clock system for RC,Crystal or external clock source, decided by mask
option.
: 110 powerful instructions.
: Up to 1.6
μ
s for 5MHz.
: 4K X 8 bits.
: 244 X 4 bits.
: 2 ports (5-bit) and sleep/hold releasing function are available by mask option.
: 2 ports (8-bit)(open-drain or push-pull; high current for LED driving(20mA) or
low current type).
: 6 ports (23-bit) (push-pull or open-drain decided by mask option).
: Two 12-bit timer/counters are programmable for timer, event counter and pulse
width measurement.
Built-in time base counter : 22 stages.
Subroutine nesting
: Up to 13 levels.
Interrupt
: External . . . . . 2 input interrupt sources.
Internal . . . . . . 2 Timer overflow interrupts.
1 Time base interrupt.
1 SIO interrupt.
SIO function
: Serial bidirection interface can transfer 4-bit data in or out by external or internal
clock with leading or trailing edge shift mode.
Power saving function
: Sleep function, CPU hold internal state and stop oscillator working.
Hold function, CPU hold internal state and oscillator still working.
Package type
: EM73400AM
SOP
EM73400CR
SDIP
EM73400DQ
QFP
Clock source
Instruction set
Instruction cycle time
ROM capacity
RAM capacity
Input port
Output port
Bidirection I/O port
12 bits timer/counter
28 pins.
42 pins.
44 pins.
Patent Number : 61007 (R.O.C)
Patent Pending : 83216083 (R.O.C)