AT89C5122D-RDTUM Atmel, AT89C5122D-RDTUM Datasheet - Page 41
AT89C5122D-RDTUM
Manufacturer Part Number
AT89C5122D-RDTUM
Description
IC 8051 MCU FLASH 32K 64VQFP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C5122D-PSTUM.pdf
(208 pages)
Specifications of AT89C5122D-RDTUM
Core Processor
8051
Core Size
8-Bit
Speed
48MHz
Connectivity
SmartCard, SPI, UART/USART, USB
Peripherals
LED, POR, WDT
Number Of I /o
46
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
For Use With
AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
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Clock Tree Architecture
4202F–SCR–07/2008
Figure 18. PLL Programming Flow
The clock controller outputs several different clocks as shown in Figure 19:
•
•
•
•
•
These clocks are enabled or not depending on the power reduction mode as detailed in
Section “Power Management”, page 178.
These clocks are generated using four presacalers defined in the table below:
Prescaler
PR1
PR2
PR3
PR4
a clock for the CPU core
a clock for the peripherals which is used to generate the timers, watchdog, SPI,
UART, and ports sampling clocks. This divided clock will be used to generate the
alternate card clock.
a clock for the USB
a clock for the SCIB controller
a clock for the DC/DC converter
Configure Dividers
Programming
PLL Locked?
N3:0=
R3:0=
Enable PLL
PLOCK= 1?
PLLEN= 1
PLL
Register
CKRL
SCICLK
SCSR
DCCKPS
xxxxb
xxxxb
Reload Factor
CKRL[0:3]
SCICLK[0:5]
ALTKPS[0:1]
DCCKPS[3:0]
AT83R5122, AT8xC5122/23
Smart card
Function
CPU & Peripheral clocks
Alternate card
DC/DC
41
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