AT87C51RB2-3CSUM Atmel, AT87C51RB2-3CSUM Datasheet - Page 43
AT87C51RB2-3CSUM
Manufacturer Part Number
AT87C51RB2-3CSUM
Description
IC 8051 MCU 16K OTP 40MHZ 40DIP
Manufacturer
Atmel
Series
87Cr
Datasheet
1.TS87C51RB2-VIA.pdf
(86 pages)
Specifications of AT87C51RB2-3CSUM
Core Processor
8051
Core Size
8-Bit
Speed
40/20MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
16KB (16K x 8)
Program Memory Type
OTP
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
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4188F–8051–01/08
Table 6-19.
Reset Value = X000 0000b
Not bit addressable
Number
Bit
7
6
5
4
3
2
1
0
7
-
IPH Register
IPH - Interrupt Priority High Register (B7h)
PPCH
Mnemonic
6
PPCH
PX1H
PX0H
PT2H
PT1H
PT0H
PSH
Bit
-
PT2H
5
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA interrupt priority bit high.
PPCHPPC
Timer 2 overflow interrupt Priority High bit
PT2H PT2
Serial port Priority High bit
Timer 1 overflow interrupt Priority High bit
PT1H PT1Priority Level
External interrupt 1 Priority High bit
PX1HPX1Priority Level
Timer 0 overflow interrupt Priority High bit
PT0H PT0
External interrupt 0 Priority High bit
PX0HPX0
PSH PS
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1 Highest
0
1
0
1
0Lowest
1
0
1Highest
0Lowest
1
0
1Highest
0Lowest
1
0
1Highest
0
1
0
1
0
1
0
1
PSH
4
Lowest
Lowest
Highest
Priority Level
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Priority Level
PT1H
3
PX1H
AT/TS8xC51Rx2
2
PT0H
1
PX0H
0
43
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