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參數(shù)資料
| 型號(hào)： | GMS90L31 |
| 英文描述： | 8-Bit CMOS Microcontrollers(高性價(jià)比的51單片機(jī)，片內(nèi)無ROM,128字節(jié)RAM,低電壓) |
| 中文描述： | 8位CMOS微控制器（高性價(jià)比的51單片機(jī)，片內(nèi)無光盤，128字節(jié)的RAM，低電壓） |
| 文件頁數(shù)： | 11/59頁 |
| 文件大?。?/td> | 812K |
| 代理商： | GMS90L31 |
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Symbol
Pin Number
P-DIP-40
Input/
Output
Function
P-LCC-44
P-MQFP-44
ALE / PROG
33
30
27
O
The
Address Latch Enable / Program pulse
Output pulse for latching the low byte of the address
during an access to external memory. In normal
operation, ALE is emitted at a constant rate of 1/6 the
oscillator frequency, and can be used for external
timing or clocking. Note that one ALE pulse is skipped
during each access to external data memory. This pin
is also the program pulse input(PROG) during
EPROM programming.
In GMS9xC54/56/58:
If desired, ALE operation can be disabled by setting
bit 0 of SFR location 8E
H
. With this bit set, the pin is
weakly pulled high. The ALE disable feature will be
terminated by reset. Setting the ALE-disable bit has
no affect if the microcontroller is in external
execution mode.
External Access Enable
/
Program Supply
Voltage
EA must be external held low to enable the device to
fetch code from external program memory locations
0000
H
to FFFF
H
. If EA is held high, the device
executes from internal program memory unless the
program counter contains an address greater than its
internal memory size. This pin also receives the
12.75V programming supply voltage(V
PP
) during
EPROM programming.
Note; however, that if any of the Lock bits are
programmed, EA will be internally latched on reset.
Port 0
Port 0 is an 8-bit open-drain bidirectional I/O port. Port
0 pins that have 1s written to them float and can be
used as high-impedance inputs. Port 0 is also the
multiplexed low-order address and data bus during
accesses to external program and data memory. In
this application it uses strong internal pull-ups when
emitting 1s. Port 0 also outputs the code bytes during
program verification in the GMS97C5x. External
pull-up resistors are required during program
verification.
Circuit ground potential
EA / V
PP
35
31
29
I
P0.0 - P0.7
43-36
39-32
37-30
I/O
V
SS
22
20
16
-
V
CC
44
40
38
-
Supply terminal
for all operating modes
N.C.
1,12, 23,34
-
6,17,28,39
-
No connection
8-Bit CMOS Microcontroller
GMS90 Series
MAY. 1998
11
LG Semicon MCU
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| GMS90L51 | 8-Bit CMOS Microcontrollers(高性價(jià)比的51單片機(jī)，片內(nèi)4KROM,128字節(jié)RAM,低電壓) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| GMS90L32 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS90L320 | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS90L320PL | 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS90L320Q | 制造商:HYUNDAI 功能描述:8-BIT SINGLE-CHIP MICROCONTROLLERS |
| GMS90L32PL | 制造商:HYUNDAI 功能描述:MCS-51 Family MCUs |
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