AT89C5131-PLTIL ATMEL Corporation, AT89C5131-PLTIL Datasheet - Page 112

• Manufacturer Part Number: AT89C5131-PLTIL
• Description: 8-bit Flash Microcontroller with Full Speed USB Device
• Manufacturer: ATMEL Corporation

Registers
112
AT89C5131
Table 84. SSCON Register
SSCON - Synchronous Serial Control Register (93h)
Table 85. SSDAT (095h) - Synchronous 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 .
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
Control Rate bit 0
See Table
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
4136B–USB–09/03
CR0
SD0
0
0