AT89C5122D-RDRUM Atmel, AT89C5122D-RDRUM Datasheet - Page 92

• Manufacturer Part Number: AT89C5122D-RDRUM
• Description: IC 8051 MCU 32K CRAM USB 64-VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-RDRUM

• 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: -
• Other names: AT89C5122D-RDRUMTR

DC/DC Converter register
Table 61. DC/DC Converter Control Register - DCCKPS (S:BFh)
Reset Value = 0000 0000b
92
Bit Number
MODE
5 - 4
3 - 0
7
7
6
AT83R5122, AT8xC5122/23
Bit Mnemonic
DCCKPS[3:0]
OVFADJ
BOOST[1:0]
OVFADJ
MODE
6
Description
Regulation mode
0 : Pump mode (External Inductance required)
1 : Regulator mode (No External inductance required if VCC > CVCC+0.3V)
Current Overflow Adjustment on Smart Card terminal
0 : normal: 100 mA average
1 : normal + 20%
VCARDOK=0
Maximum Startup Current drawn from power supply
00 : Normal: 30 mA average
01 : Normal + 30%
10 : Normal + 50%
11 : Normal + 80%
DC/DC Clock Prescaler Value
0000 : Division factor: 2 (reset value)
0001 : Division factor: 3
0010 : Division factor: 4
0011 : Division factor: 5
0100 : Division factor: 6
0101 : Division factor: 8
0110 : Division factor: 10
0111 : Division factor: 12
1000 : Division factor: 24
Other values are reserved
BOOST1
5
BOOST0
4
DCCKPS3
3
DCCKPS2
VCARDOK=1
Current Overflow Level on Smart Card terminal
00 : Normal = OVFADJ
01 : Normal + 30%
10 : Normal + 50%
11 : Normal + 80%
2
DCCKPS1
1
4202F–SCR–07/2008
DCCKPS0
0