參數(shù)資料
型號： P89C51RB2FP
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
中文描述： 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PDIP40
封裝： 0.600 INCH, PLASTIC, SOT-129-1, DIP-40
文件頁數(shù)： 6/52頁
文件大小： 289K
代理商： P89C51RB2FP
Philips Semiconductors
Preliminary specification
89C51RB2/89C51RC2/
89C51RD2
80C51 8-bit Flash microcontroller family
16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
1999 Sep 23
6
PIN DESCRIPTIONS
MNEMONIC
PIN NUMBER
TYPE
NAME AND FUNCTION
PDIP
PLCC
PQFP
V
SS
V
CC
20
22
16
I
Ground:
0 V reference.
40
44
38
I
Power Supply:
This is the power supply voltage for normal, idle, and power-down
operation.
P0.0–0.7
39–32
43–36
37–30
I/O
Port 0:
Port 0 is an 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.
P1.0–P1.7
1–8
2–9
40–44,
1–3
I/O
Port 1:
Port 1 is an 8-bit bidirectional I/O port with internal pull-ups on all pins
except P1.6 and P1.7 which are open drain. Port 1 pins that have 1s written to them
are pulled high by the internal pull-ups and can be used as inputs. As inputs, port 1
pins that are externally pulled low will source current because of the internal
pull-ups. (See DC Electrical Characteristics: I
IL
).
Alternate functions for 89C51RB2/RC2/RD2 Port 1 include:
T2 (P1.0):
Timer/Counter 2 external count input/Clockout (see Programmable
Clock-Out)
T2EX (P1.1):
Timer/Counter 2 Reload/Capture/Direction Control
ECI (P1.2):
External Clock Input to the PCA
CEX0 (P1.3):
Capture/Compare External I/O for PCA module 0
CEX1 (P1.4):
Capture/Compare External I/O for PCA module 1
CEX2 (P1.5):
Capture/Compare External I/O for PCA module 2
CEX3 (P1.6):
Capture/Compare External I/O for PCA module 3
CEX4 (P1.7):
Capture/Compare External I/O for PCA module 4
1
2
40
I/O
2
3
4
5
6
7
8
3
4
5
6
7
8
9
41
42
43
44
1
2
3
I
I
I/O
I/O
I/O
I/O
I/O
P2.0–P2.7
21–28
24–31
18–25
I/O
Port 2:
Port 2 is an 8-bit bidirectional I/O port with internal pull-ups. Port 2 pins that
have 1s written to them are pulled high by the internal pull-ups and can be used as
inputs. As inputs, port 2 pins that are externally being pulled low will source current
because of the internal pull-ups. (See DC Electrical Characteristics: I
IL
). Port 2
emits the high-order address byte during fetches from external program memory
and during accesses to external data memory that use 16-bit addresses (MOVX
@DPTR). In this application, it uses strong internal pull-ups when emitting 1s.
During accesses to external data memory that use 8-bit addresses (MOV @Ri),
port 2 emits the contents of the P2 special function register.
P3.0–P3.7
10–17
11,
13–19
5, 7–13
I/O
Port 3:
Port 3 is an 8-bit bidirectional I/O port with internal pull-ups. Port 3 pins that
have 1s written to them are pulled high by the internal pull-ups and can be used as
inputs. As inputs, port 3 pins that are externally being pulled low will source current
because of the pull-ups. (See DC Electrical Characteristics: I
). Port 3 also serves
the special features of the 89C51RB2/RC2/RD2, as listed below:
RxD (P3.0):
Serial input port
TxD (P3.1):
Serial output port
INT0 (P3.2):
External interrupt
INT1 (P3.3):
External interrupt
T0 (P3.4):
Timer 0 external input
T1 (P3.5):
Timer 1 external input
WR (P3.6):
External data memory write strobe
RD (P3.7):
External data memory read strobe
10
11
12
13
14
15
16
17
11
13
14
15
16
17
18
19
5
7
8
9
10
11
12
13
I
O
I
I
I
I
O
O
RST
9
10
4
I
Reset:
A high on this pin for two machine cycles while the oscillator is running,
resets the device. An internal diffused resistor to V
SS
permits a power-on reset
using only an external capacitor to V
CC
.
Address Latch Enable:
Output pulse for latching the low byte of the address
during an access to external memory. In normal operation, ALE is emitted twice
every machine cycle, and can be used for external timing or clocking. Note that one
ALE pulse is skipped during each access to external data memory. ALE can be
disabled by setting SFR auxiliary.0. With this bit set, ALE will be active only during a
MOVX instruction.
ALE
30
33
27
O
相關(guān)PDF資料
PDF描述
P89C51RB2HFA 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
P89C51RB2HFB 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
P89C51RB2HFP 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
P89C51RC2FA 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
P89C51RC2FB 80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P89C51RB2H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
P89C51RB2HBA 制造商:NXP Semiconductors 功能描述:8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQCC44
P89C51RB2HBB 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
P89C51RB2HBBD 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit Flash microcontroller family
P89C51RB2HBP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit Flash microcontroller family 16KB/32KB/64KB ISP/IAP Flash with 512B/512B/1KB RAM
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