AT89C51IC2-SLRIL Atmel, AT89C51IC2-SLRIL Datasheet - Page 99
AT89C51IC2-SLRIL
Manufacturer Part Number
AT89C51IC2-SLRIL
Description
IC MCU FLASH 8051 32K 3V 44-PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51IC2-SLRIM.pdf
(147 pages)
Specifications of AT89C51IC2-SLRIL
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
34
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
1.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
AT89C51IC2SLRILTR
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Registers
4301D–8051–02/08
Table 73. SSCON Register
SSCON - Synchronous Serial Control register (93h)
Table 74. SSDAT (095h) - Syncrhonous Serial Data register (read/write)
Number
Number
CR2
SD7
Bit
Bit
7
7
6
5
4
3
2
1
0
7
7
6
5
4
3
2
Mnemonic Description
Mnemonic Description
SSIE
SSIE
CR2
CR1
CR0
SD6
SD7
SD6
SD5
SD4
SD3
SD2
STA
ST0
Bit
Bit
AA
SI
6
6
Control Rate bit 2
See Table 67.
Synchronous Serial Interface Enable bit
Clear to disable SSLC.
Set to enable SSLC.
Start flag
Set to send a START condition on the bus.
Stop flag
Set to send a STOP condition on the bus.
Synchronous Serial Interrupt flag
Set by hardware when a serial interrupt is requested.
Must be cleared by software to acknowledge interrupt.
Assert Acknowledge flag
Clear in master and slave receiver modes, to force a not acknowledge (high level
on SDA).
Clear to disable SLA or GCA recognition.
Set to recognise SLA or GCA (if GC set) for entering slave receiver or transmitter
modes.
Set in master and slave receiver modes, to force an acknowledge (low level on
SDA).
This bit has no effect when in master transmitter mode.
Control Rate bit 1
See Table 67.
Control Rate bit 0
See Table 67.
Address bit 7 or Data bit 7.
Address bit 6 or Data bit 6.
Address bit 5 or Data bit 5.
Address bit 4 or Data bit 4.
Address bit 3 or Data bit 3.
Address bit 2 or Data bit 2.
STA
SD5
5
5
STO
SD4
4
4
SD3
SI
3
3
SD2
AA
2
2
CR1
SD1
1
1
CR0
SD0
0
0
99
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