8-BIT MICRO-CONTROLLER - EMC
Description
DESCRIPTION
EM78P247/447A/B/C 8-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT
Preliminary
The EM78P247/447A/B/C is an 8-bit microprocessor with low-power, high speed CMOS technology.
There are 4Kx13 bits Electical One Time Programmable Read Only Memory (OTP-ROM) within it.
It provides 1 Protect bit and 6 One-time Programmable Option bits to protect the OTP memory code from any external access as well as the user's options.
The OTP ROM will be incorporated into EM78P247/447A/B/C 8-bit microcontroller instead of it's original memory.
The user's development program can be easily programmed into or verify from this OTP memory by using EMC OTP PROGRAMMER.
FEATURES
• Operating voltage range: 2.
5V~5.
5V
• Available in temperature range: 0°C~70°C
• Operating frequency range:
Crystal Type: DC~20MHz at 5V
DC~8MHz at 3V
RC Type:
DC~4MHz at 5V
DC~4MHz at 3V
• 2Kx13 on chip ROM (EM78267A/B/C)
• 4Kx13 on chip ROM (EM78467A/B/C)
• 9 special function registers
• 148x8 general purpose registers (SRAM)
• 3 bi-directional tri-state I/O ports (20 I/O pins for EM78P247/447A) (24 I/O pins for EM78P247/447B)
(22 I/O pins for EM78247/447C)
• 5 level stack for subroutine nesting
• 8-bit real time clock/counter (TCC) with selective signal sources and trigger edges, and with overflow interrupt
• Selectable oscillator options:
XTAL1 type (High frequency)
XTAL2 type (32.
768KHz)
RC type
External clock input
• Two oscillator periods per instruction cycle
• Power down mode
• Programmable wake up from sleep circuit on I/O ports
• Programmable free running on-chip watchdog timer
• Ten pull-up and wake-up pins
• Two open-drain pins
• Two R-option pins
• Interrupt function available
• 28 pin DIP, SOIC, SSOP
(EM78P247/447A)
28 pin SOIC
(EM78P247/447C)
* This specification are subject to be changed without notice.
9.
30.
1997 1
32 pin DIP, SOIC
EM78P247/447A/B/C
8-BIT MICRO-CONTROLLER FOR GENERAL PURPOSE PRODUCT
Preliminary
(EM78P247/447B)
• Function compatible w...
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