AT89C51AC3-RLTIM Atmel, AT89C51AC3-RLTIM Datasheet - Page 120
AT89C51AC3-RLTIM
Manufacturer Part Number
AT89C51AC3-RLTIM
Description
IC 8051 MCU FLASH 64K 44VQFP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51AC3-RLTUM.pdf
(140 pages)
Specifications of AT89C51AC3-RLTIM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
36
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
2.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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AT89C51AC3
Table 70. IPH1 Register
IPH1 (S:F7h)
Interrupt High Priority Register 1
Reset Value = XXXX 0X0Xb
Number
Bit
7
-
7
6
5
4
3
2
1
0
Mnemonic Description
PADCH
SPIH
Bit
6
-
-
-
-
-
-
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
SPI Interrupt Priority Level Most Significant bit
SPIH SPIL Priority level
0
0
1
1
Reserved
The value read from this bit is indeterminate. Do not set this bit.
ADC Interrupt Priority Level Most Significant bit
PADCH PADCL Priority level
0
0
1
1
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5
-
0
1
0
1
0
1
0
1
Lowest
Highest
Lowest
Highest
4
-
SPIH
3
2
-
4383D–8051–02/08
PADCH
1
0
-
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