AT89C5132 Atmel Corporation, AT89C5132 Datasheet - Page 14

• 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

6.3.2
6.4
14
Registers
AT89C5132
PLL Programming
Figure 6-4.
Figure 6-5.
The PLL is programmed using the flow shown in Figure 6-6. As soon as clock generation is
enabled, the user must wait until the lock indicator is set to ensure the clock output is stable. The
PLL clock frequency will depend on the audio interface clock frequencies.
Figure 6-6.
Table 1. CKCON Register
CLOCK
OSC
PLL Block Diagram and Symbol
PLL Filter Connection
PLL Programming Flow
PLLclk
N divider
N6:0
=
PFILT
OSCclk
---------------------------------------------- -
N
PLLCON.1
PLLCON.0
PLOCK
PLLEN
+
×
PFLD
Configure Dividers
R9:0 = xxxxxxxxxxb
1
(
Programming
R
N6:0 = xxxxxxb
PLOCK = 1?
PLL Locked?
PLLRES = 0
Enable PLL
PLLEN = 1
+
V
1
PLL
SS
)
R
Down
C1
Up
V
R divider
SS
R9:0
PFILT
C2
CHP
Vref
VCO
PLL Clock Symbol
CLOCK
PLL
4173E–USB–09/07
PLL
Clock