參數(shù)資料
型號(hào)： EM78P467A
廠商： ELAN Microelctronics Corp .
英文描述： 8-Bit Micro-Controller for Consumer Product(帶4K × 13片上ROM，工作電壓2.5V-5.5V的8位微控制器)
中文描述： 8位微控制器的消費(fèi)產(chǎn)品（帶4K的× 13片上ROM的，工作電壓為2.5V至5.5V的8位微控制器）
文件頁(yè)數(shù)： 3/20頁(yè)
文件大?。?/td> 144K
代理商： EM78P467A
3
* This specification are subject to be changed without notice.
EM78P267/467A/B/C
8-BIT MICRO-CONTROLLER FOR CONSUMER PRODUCT
Preliminary
9.5.1997
PIN DESCRIPTION
Symbol
OSCI
Type
I
Function
XTAL Type : Crystal input terminal or external clock input pin. RC
type : RC oscillator input pin.
XTAL type : output terminal for crystal oscillator or external clock
input pin. RC type : clock output with a period of one instruction
cycle is put on this pin.
Real time clock/counter, Schmitt trigger input pin. Must be tied to
VDD or VSS if not in use.
Schmitt trigger input pin. If this pin remains logic low, the controller
is resset.
Port 7 is an 8-bit bi-directional I/O port. P74~P75 can be pulled-high
internally by software control. P76~P77 can have open-drain output
by software control. P70 and P71 are also the R-option pins.
Port 6 is an 8-bit bi-direction I/O port. They can be pulled-high
internally by software control.
Low order 4 pins of Port 5. In case of EM78P447A, only low oder 4
pins are used in port 5.
High order 4 pins od Port 5. In case of EM78P447B, Port 5 is an 8-
bit bi-directional I/O port.
Falling edge triggered interrupt input pin. Indicates an interrupt if
interrupt is enabled. It has internal pull-up (50k
).
no connection.
Power supply pin.
Ground pin.
OSCO
I/O
TCC
I
RESET
I
P70~P77
I/O
P60~P67
I/O
P50~P53
I/O
P54~P57
I/O
INT
I
NC
VDD
VSS
-
-
-
FUNCTION DESCRIPTIONS
Operational Registers
R0 (Indirect Addressing Register)
R0 is not a physically implemented register. It is useful as indirect addressing pointer. Any instruction using R0
as register actually accesses data pointed by the RAM Select Register (R4).
R1 (TCC)
Increased by an external signal edge applied to TCC pin, or by the instruction cycle clock.
Written and read by the program as any other register.
相關(guān)PDF資料
PDF描述
EM78P267A 8-Bit Micro-Controller for Consumer Product(帶2K × 13片上ROM，工作電壓2.5V-5.5V的8位微控制器)
EM78P468N 8-BIT MICROCONTROLLER
EM78P468NAQ 8-BIT MICROCONTROLLER
EM78P468NBQ 8-BIT MICROCONTROLLER
EM78P468NCQ 8-BIT MICROCONTROLLER
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