參數(shù)資料
型號(hào)： DS87C550-QCL+
廠商： Maxim Integrated Products
文件頁數(shù)： 45/49頁
文件大?。?/td> 0K
描述： IC MCU EPROM ADC/PWM HS 68-PLCC
標(biāo)準(zhǔn)包裝： 18
系列： 87C
核心處理器： 8051
芯體尺寸： 8-位
速度： 33MHz
連通性： EBI/EMI，SIO，UART/USART
外圍設(shè)備： 電源故障復(fù)位，PWM，WDT
輸入/輸出數(shù)： 55
程序存儲(chǔ)器容量： 8KB（8K x 8）
程序存儲(chǔ)器類型： OTP
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 6x10b
振蕩器型： 外部
工作溫度： 0°C ~ 70°C
封裝/外殼： 68-LCC（J 形引線）
包裝： 管件
DS87C550 EPROM High-Speed Microcontroller with ADC and PWM
5 of 49
PLCC/
CLCC
QFP
SIGNAL NAME
DESCRIPTION
50-57
57
56
55
54
53
52
51
50
51-58
58
57
56
55
54
53
52
51
P0.0 (AD0)
P0.1 (AD1)
P0.2 (AD2)
P0.3 (AD3)
P0.4 (AD4)
P0.5 (AD5)
P0.6 (AD6)
P0.7 (AD7)
Port 0-I/O - AD0-7. Port 0 is an open-drain 8-bit, bi-directional general-purpose
I/O port. When used in this mode pullup resistors are required to provide a logic 1
output. As an alternate function, Port 0 operates as a multiplexed address/data bus
to access off-chip memory or peripherals. In this mode, the LSB of the memory
address is output on the bus during the time that ALE is high. When ALE falls to
a logic 0, the port transitions to a bi-directional data bus. In this mode, the port
provides active high drivers for logic 1 output. The reset condition of Port 0 is tri-
state (i.e., the open drain devices are off).
39-46
39
40
41
42
43
44
45
46
38-42
45-47
38
39
40
41
42
45
46
47
P2.0 (A8)
P2.1 (A9)
P2.2 (A10)
P2.3 (A11)
P2.4 (A12)
P2.5 (A13)
P2.6 (A14)
P2.7 (A15)
Port 2-I/O Address A15:A8. Port 2 functions as an 8-bit bi-directional I/O port
or alternately as an external address bus (A15-A8). The reset condition of Port 2 is
logic high I/O state. In this state, weak pullups hold the port high allowing the
pins to be used as an input or output as described above for Port 1. As an alternate
function Port 2 can function as MSB of the external address bus. This bus can be
used to read external memory or peripherals.
24-31
18-20
23-27
P3.0-P3.7
Port 3 - I/O. Port 3 functions as an 8-bit bi-directional I/O port or alternately as
an interface for External Interrupts, Serial Port 0, Timer 0 & 1 Inputs, and RD and
WR
strobes. When functioning as an I/O port, these pins operate as indicated
above for Port 1. The alternate modes of Port 3 are detailed below.
Port
Alternate Mode
24
18
P3.0
RXD0
Serial Port 0 Input
25
19
P3.1
TXD0
Serial Port 0 Output
26
20
P3.2
INT0
External Interrupt 0
27
23
P3.3
INT1
External Interrupt 1
28
24
P3.4
T0
Timer 0 External Input
29
25
P3.5
T1
Timer 1 External Input
30
26
P3.6
WR
External Data Memory Write Strobe
31
27
P3.7
RD
External Data Memory Read Strobe
7-14
80
1-2
4-8
P4.0-P4.7
Port 4 - I/O. Port 4 functions as an 8-bit bi-directional I/O port or alternately as
an interface to Timer 2’s Capture Compare functions. When functioning as an I/O
port, these pins operate as indicated in the Port 1 description. The alternate modes
of Port 4 are detailed below.
Port 4 Alternate Mode
7
80
P4.0
CMSR0
Timer 2 compare match set/reset output 0
8
1
P4.1
CMSR1
Timer 2 compare match set/reset output 1
9
2
P4.2
CMSR2
Timer 2 compare match set/reset output 2
10
4
P4.3
CMSR3
Timer 2 compare match set/reset output 3
11
5
P4.4
CMSR4
Timer 2 compare match set/reset output 4
12
6
P4.5
CMSR5
Timer 2 compare match set/reset output 5
13
7
P4.6
CMT0
Timer 2 compare match toggle output 0
14
8
P4.7
CMT1
Timer 2 compare match toggle output 1
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