AT89C51RE2 Atmel Corporation, AT89C51RE2 Datasheet - Page 11

• Manufacturer Part Number: AT89C51RE2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RE2

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 34
• Spi: 1
• Uart: 2
• Sram (kbytes): 8.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART/OCD
• Watchdog: Yes

Table 11. SPI Controller SFRs
Table 12. Two-Wire Interface Controller SFRs
Table 13. Keyboard Interface SFRs
7663E–8051–10/08
SSCON
SSCS
SSDAT
SSADR
SPCON
SPSCR
SPDAT
KBLS
KBE
KBF
Mnemonic
Mnemonic
Mnemonic
Add
Add
Add
C3h
C4h
C5h
93h
94h
95h
96h
9Ch
9Dh
9Eh
Name
Synchronous Serial control
Synchronous Serial Status
Synchronous Serial Data
Synchronous Serial Address
Name
SPI Control
SPI Status
SPI Data
Name
Keyboard Level Selector
Keyboard Input Enable
Keyboard Flag Register
SSCR2
KBLS7
SSC4
SSD7
SSA7
SPR2
SPD7
KBE7
KBF7
SPIF
7
7
7
KBLS6
SPEN
SSPE
SSD6
SPD6
SSC3
SSA6
KBE6
KBF6
6
6
6
KBLS5
SSDIS
SSSTA
SPD5
KBE5
SSC2
SSD5
SSA5
KBF5
OVR
5
5
5
KBLS4
SSSTO
MSTR
MODF
SPD4
KBE4
KBF4
SSC1
SSD4
SSA4
4
4
4
KBLS3
CPOL
SPTE
SPD3
KBE3
KBF3
SSC0
SSD3
SSA3
SSI
3
3
3
UARTM
KBLS2
CPHA
SPD2
KBE2
SSAA
KBF2
SSD2
SSA2
AT89C51RE2
2
2
2
0
SPTEIE
SSCR1
KBLS1
SPR1
SPD1
SSD1
SSA1
KBE1
KBF1
1
1
1
0
MODFIE
SSCR0
KBLS0
SSGC
SPR0
SPD0
SSD0
KBE0
KBF0
0
0
0
0
11