Rainbow-electronics AT83C26 Manual de usuario descargar pdf (Pagina 6)

7511B–SCR–10/05

AT83C26

38 CVSSB GND

DC/DCB input.

This pin must be directly connected to the VSS of power supply.

39 LIB 2kV PWR

DC/DCB input.

LIB must be tied to VCC pin through an external coil (typically 10µH) and

provides the current for the charge pump of the DC/DCB converter.

It may be directly connected to VCC if the step-up converter is not used

(see STEPREGB bit in DCDCB register and see minimum VCC values in

Table 53.for class A and Table 54. for class B)

40 CVCCB 2kV PWR

DC/DCB output.

The two CVCCB pins are connected together near the package. CVCCB

pin is only used for DC/DCB voltage measurements.The reason of two

CVCCB pins is to reduce noise.

41 CVCCB 2kV PWR DC/DCB output.

42 RESET VCC 2kV

I/O

open drain

Micro controller interface function: reset signal.

• power on reset

• A low level on this pin keeps the AT83C26 under reset even if

applied on power-on. It also resets the AT83C26 if applied when the

AT83C26 is running.

• Asserting RESET

43 CPRES2 VCC 4kV+

pull up

Card presence for SC2 interface.

An internal pull to VCC can be activated in the pad if necessary using

PULLUP2 bit in SC2_CFG1 register (activated by default).

44 CVCCINB PWR This pin must be connected to CVCCB pins next to the package.

45 CVCC2 4kV+ PWR VCC pin for SC2 interface.

46 CRST2 CVCC2 4kV+ O CRST pin for SC2 interface.

47 CCLK2 CVCC2 4kV+ O CCLK pin for SC2 interface.

48 CIO2 CVCC2 4kV+

I/O

pull up

CIO pin for SC2 interface.

Table 1. Ports Description (Continued)

VQFP48 or

QFN48

Pin number

Pad Name Pad Internal

Power Supply

ESD

Limits Pad Type Description

1 2 3 4 5 6 7 8 9 10 11 ... 76 77

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