Rainbow Electronics AT83C26 - Manual (Page 6)

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+
I
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