|
|
EM78P467CのメーカーはEMCです、この部品の機能は「8-BIT MICRO-CONTROLLER」です。 |
部品番号 | EM78P467C |
| |
部品説明 | 8-BIT MICRO-CONTROLLER | ||
メーカ | EMC | ||
ロゴ | |||
このページの下部にプレビューとEM78P467Cダウンロード(pdfファイル)リンクがあります。 Total 20 pages
DESCRIPTION
EM78P267/467A/B/C
8-BIT MICRO-CONTROLLER FOR CONSUMER PRODUCT
Preliminary
The EM78P267/467A/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 EM78P267/467A/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 EM78P267/467A) (24 I/O pins for EM78P267/467B)
(22 I/O pins for EM78P267/467C)
• 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
(EM78P267/467A)
28 pin SOIC
(EM78P267/467C)
* This specification are subject to be changed without notice.
9.5.1997 1
1 Page PIN DESCRIPTION
Symbol
OSCI
Type
I
OSCO
I/O
TCC
RESET
P70~P77
I
I
I/O
P60~P67
P50~P53
P54~P57
INT
NC
VDD
VSS
I/O
I/O
I/O
I
-
-
-
EM78P267/467A/B/C
8-BIT MICRO-CONTROLLER FOR CONSUMER PRODUCT
Preliminary
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 (50kΩ).
no connection.
Power supply pin.
Ground pin.
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.
* This specification are subject to be changed without notice.
9.5.1997 3
3Pages EM78P267/467A/B/C
8-BIT MICRO-CONTROLLER FOR CONSUMER PRODUCT
Preliminary
00 R0
01 R1(TCC)
02 R2(PC)
03 R3(Status)
04 R4(RSR)
05 R5(Port5)
06 R6(Port6)
07 R7(Port7)
08 R8
09 R9
0A RA
0B RB
0C RC
0D RD
0E RE
0F RF
Stack
(5 levels)
IOC5
IOC6
IOC7
IOCB
IOCE
IOCF
10
11
16x8
Common
: Register
:
1F
00 01 10 11
10
31x8
31x8
31x8
31x8
:
Bank
Bank
Bank
Bank
Register
Register
Register
Register
:
(Bank 0) (Bank 1) (Bank 2) (Bank 3)
3E
3F R3F
Fig. 4 Data memory configuration
R8~R1F, R20~R3E (General Purpose Register)
• R8~R1F, and R20~R3E (including Banks 0~3) are general purpose registers.
R3F (Interrupt Status Register)
7 6 5 4 3 210
- - - - EXIF - - TCIF
• Bit 0 (TCIF) TCC timer overflow interrupt flag. Set when TCC timer overflows, reset in software.
• Bit 3 (EXIF) External interrupt flag. Set by falling edge on /INT pin, reset in software.
• Bits 1~2, 4~7 Not used.
• “1” means interrupt request, “0” means non-interrupt
• R3F can be cleared by instruction and cannot be set by instruction.
* This specification are subject to be changed without notice.
9.5.1997
6
6 Page | |||
ページ | 合計 : 20 ページ | ||
|
PDF ダウンロード | [ EM78P467C データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
EM78P467 | 8-BIT MICRO-CONTROLLER | EMC |
EM78P467A | 8-BIT MICRO-CONTROLLER | EMC |
EM78P467B | 8-BIT MICRO-CONTROLLER | EMC |
EM78P467C | 8-BIT MICRO-CONTROLLER | EMC |