8-BIT MICRO-CONTROLLER - EMC
Description
DESCRIPTION
EM78267/467A/B/C 8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT
Preliminary
The EM78267/467 A/B/C is an 8-bit microprocessor with low-power, high speed CMOS technology.
Integrated onto a single chip are on-chip watchdog timer (WDT), RAM, ROM, programmable real time clock/counter, power down mode and bi-directional tri-state I/O ports.
It can be developed as cordless phone or other applications.
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 EM78267/467A) (24 I/O pins for EM78267/467B)
(22 I/O pins for EM78267/467C)
• 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
(EM78267/467A)
28 pin SOIC
(EM78267/467C)
32 pin DIP, SOIC
(EM78267/467B)
* This specification are subject to be changed without notice.
9.
30.
1997 1
PIN ASSIGNMENTS
EM78267/467A/B/C 8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT
Preliminary
EM78267A EM78467A
TCC VDD
NC VSS /INT P50 P51 P52 P53 P60 P61 P62 P63 P64
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 /RESET 27 OSCI 26 OSCO 25 P77 24 P76 23 P75 22 P74 21 P73 20 P72 19 P71 18 P70 17 P67 16 P66 15 P65
DIP, SOIC
EM78267A EM78467A
VSS TCC VDD VDD P50 P51 P52 P53...
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