AT89C5132 Atmel Corporation, AT89C5132 Datasheet - Page 16

• Manufacturer Part Number: AT89C5132
• Manufacturer: Atmel Corporation

Specifications of AT89C5132

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-12C
• Max I/o Pins: 44
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Uart: 1
• Adc Channels: 2
• Adc Resolution (bits): 10
• Adc Speed (ksps): 22.7
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 2
• Isp: UART/USB
• Watchdog: Yes

16
AT89C5132
Table 3. PLLCON Register
PLLCON (S:E9h) – PLL Control Register
Reset Value = 0000 1000b
Table 4. PLLRDIV Register
PLLRDIV (S:EFh) – PLL R Divider Register
Reset Value = 0000 0000b
Bit Number
Bit Number
7 - 6
5 - 4
7 - 0
R1
R9
7
3
2
1
0
7
Mnemonic
Mnemonic
PLLRES
PLOCK
PLLEN
R1:0
R9:2
Bit
Bit
R0
R8
6
6
-
-
Description
PLL Least Significant Bits R Divider
2 LSB of the 10-bit R divider.
Reserved
The values read from these Bits are always 0. Do not set these Bits.
PLL Reset Bit
Set this bit to reset the PLL.
Clear this bit to free the PLL and allow enabling.
Reserved
The values read from this bit is always 0. Do not set this bit.
PLL Enable Bit
Set to enable the PLL.
Clear to disable the PLL.
PLL Lock Indicator
Set by hardware when PLL is locked.
Clear by hardware when PLL is unlocked.
Description
PLL Most Significant Bits R Divider
8 MSB of the 10-bit R divider.
R7
5
5
-
R6
4
4
-
PLLRES
R5
3
3
R4
2
2
-
PLLEN
R3
1
1
4173E–USB–09/07
PLOCK
R2
0
0