AT89C5122D-PSTUM Atmel, AT89C5122D-PSTUM Datasheet - Page 42

• Manufacturer Part Number: AT89C5122D-PSTUM
• Description: IC 8051 MCU FLASH 32K 64QFN
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-PSTUM

• 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-QFN
• For Use With: AT89STK-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: -

Figure 19. Clock Tree Diagram
CPU and Peripheral Clocks
42
XTAL2
XTAL1
AT83R5122, AT8xC5122/23
PCON.1
PD
CK_XTAL1
Two clocks sources are available for CPU and peripherals:
These clock sources are configured by the PR1 prescaler to generate the CPU core
CK_CPU and the peripheral clocks:
96 MHz
PLLCON.1
PLLEN
PLL
–
–
–
–
–
–
–
–
on-chip oscillator
a derivative of the PLL clock.
CK_IDLE for alternate card and peripherals registers access
CK_T0 for Timer 0
CK_T1 for Timer 1
CK_SI for the UART
CK_WD for the Watchdog Timer
CK_SPI for SPI
CK_XTAL1
CK_PLL
CK_PLL
CKSEL.0
CKS
1/2
0
1
DCCKPS[3:0]
CKRL[3:0]
PLLCON.2
PR1
SCICLK.7
XTSCS
EXT48
PR4
CK_PLL
CK_XTAL1
CK_XTAL1
1/2
CKCON0.X or
CKCON0.0
PeriphX2
CKCON1.0
0
1
X2
0
1
0
1
1
0
CKCON0.0
SCICLK[5:0]
PERIPH = T0, T1, SI, WD or SPI
CK_IDLE
PR2
X2
1
0
SCSR[3:2]
PCON.0
PR3
IDL
SCICLK[5:0]
<48
=48
CK_PERIPH
CK_DCDC
CK_IDLE
CK_IDLE
CK_CPU
CK_USB
CK_ISO
4202F–SCR–07/2008
Peripherals
Converter
Alternate
CK_T0
CK_T1
CK_SI
CK_WD
CK_SPI
DC/DC
SCIB
CPU
Card
USB