VCC Supply voltage. GND Ground. Port 0 Port 0 is an 8-bit" />
參數(shù)資料
型號(hào): AT89LS8252-12PC
廠商: Atmel
文件頁(yè)數(shù): 12/35頁(yè)
文件大?。?/td> 0K
描述: IC MICRO CTRL 12MHZ 40DIP
標(biāo)準(zhǔn)包裝: 9
系列: 89LS
核心處理器: 8051
芯體尺寸: 8-位
速度: 12MHz
連通性: SPI,UART/USART
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: 閃存
EEPROM 大小: 2K x 8
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 6 V
振蕩器型: 內(nèi)部
工作溫度: 0°C ~ 70°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
其它名稱: AT89LS825212PC
AT89LS8252
0850C–MICRO–3/06
2
Pin Description
VCC
Supply voltage.
GND
Ground.
Port 0
Port 0 is an 8-bit open drain bidirectional I/O port. As an
output port, each pin can sink eight TTL inputs. When 1s
are written to port 0 pins, the pins can be used as high-
impedance inputs.
Port 0 can also be configured to be the multiplexed low-
order address/data bus during accesses to external pro-
gram and data memory. In this mode, P0 has internal pul-
lups.
Port 0 also receives the code bytes during Flash program-
ming and outputs the code bytes during program verifica-
tion. External pullups are required during program verifica-
tion.
Port 1
Port 1 is an 8-bit bidirectional I/O port with internal pullups.
The Port 1 output buffers can sink/source four TTL inputs.
When 1s are written to Port 1 pins, they are pulled high by
the internal pullups and can be used as inputs. As inputs,
Port 1 pins that are externally being pulled low will source
current (IIL) because of the internal pullups.
Some Port 1 pins provide additional functions. P1.0 and
P1.1 can be configured to be the timer/counter 2 external
count input (P1.0/T2) and the timer/counter 2 trigger input
(P1.1/T2EX), respectively.
Pin Configurations
PDIP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
(T2) P1.0
(T2 EX) P1.1
P1.2
P1.3
(SS) P1.4
(MOSI) P1.5
(MISO) P1.6
(SCK) P1.7
RST
(RXD) P3.0
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
(WR) P3.6
(RD) P3.7
XTAL2
XTAL1
GND
VCC
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
P2.4 (A12)
P2.3 (A11)
P2.2 (A10)
P2.1 (A9)
P2.0 (A8)
PLCC
7
8
9
10
11
12
13
14
15
16
17
39
38
37
36
35
34
33
32
31
30
29
(MOSI) P1.5
(MISO) P1.6
(SCK) P1.7
RST
(RXD) P3.0
NC
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
NC
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
6
5
4
3
2
1
44
43
42
41
40
18
19
20
21
22
23
24
25
26
27
28
(WR)
P3.6
(RD)
P3.7
XTAL2
XTAL1
GND
NC
(A8)
P2.0
(A9)
P2.1
(A10)
P2.2
(A11)
P2.3
(A12)
P2.4
P1.4
(SS)
P1.3
P1.2
P1.1
(T2
EX)
P1.0
(T2)
NC
VCC
P0.0
(AD0)
P0.1
(AD1)
P0.2
(AD2)
P0.3
(AD3)
TQFP
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
44
43
42
41
40
39
38
37
36
35
34
12
13
14
15
16
17
18
19
20
21
22
(MOSI) P1.5
(MISO) P1.6
(SCK) P1.7
RST
(RXD) P3.0
NC
(TXD) P3.1
(INT0) P3.2
(INT1) P3.3
(T0) P3.4
(T1) P3.5
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
EA/VPP
NC
ALE/PROG
PSEN
P2.7 (A15)
P2.6 (A14)
P2.5 (A13)
P1.4
(SS)
P1.3
P1.2
P1.1
(T2
EX)
P1.0
(T2)
NC
VCC
P0.0
(AD0)
P0.1
(AD1)
P0.2
(AD2)
P0.3
(AD3)
(WR)
P3.6
(RD)
P3.7
XTAL2
XTAL1
GND
(A8)
P2.0
(A9)
P2.1
(A10)
P2.2
(A11)
P2.3
(A12)
P2.4
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