Rainbow-electronics AT89C5122 Manual de usuario descargar pdf (Pagina 94)

AT8xC5122/23

4202E–SCR–06/06

DC/DC Converter register

Reset Value = 0000 0000b

Table 61. DC/DC Converter Control Register - DCCKPS (S:BFh)

76543210

MODE OVFADJ BOOST1 BOOST0 DCCKPS3 DCCKPS2 DCCKPS1 DCCKPS0

Bit Number Bit Mnemonic Description

7MODE

Regulation mode

0 : Pump mode (External Inductance required)

1 : Regulator mode (No External inductance required if VCC > CVCC+0.3V)

6 OVFADJ

Current Overflow Adjustment on Smart Card terminal

0 : normal: 100 mA average

1 : normal + 20%

5 - 4 BOOST[1:0]

VCARDOK=0 VCARDOK=1

Maximum Startup Current drawn from power supply

00 : Normal: 30 mA average

01 : Normal + 30%

10 : Normal + 50%

11 : Normal + 80%

Current Overflow Level on Smart Card terminal

00 : Normal = OVFADJ

01 : Normal + 30%

10 : Normal + 50%

11 : Normal + 80%

3 - 0 DCCKPS[3:0]

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

1 2 ... 89 90 91 92 93 94 95 96 97 98 99 ... 212 213

Sin comentarios

Rainbow-electronics AT89C5122 Manual de usuario Pagina 94