Rainbow Electronics AT83C26 - Manual (Page 4)

4
7511B–SCR–10/05
AT83C26
Signals
Table 1. Ports Description
VQFP48 or
QFN48
Pin number
Pad Name Pad Internal
Power Supply
ESD
Limits Pad Type Description
1 CVCC3 4kV+ PWR VCC pin for SC3 interface.
2 CRST3/CC82 CVCC3 4kV+
I/O
pull up
See SC2_CFG1 register:
If SC2_FULL bit = 0, CRST pin for SC3 interface.
If SC2_FULL bit = 1, CC8 pin for SC2 interface.
3 CCLK3 CVCC3 4kV+ O CCLK pin for SC3 interface.
4 CIO3/CC42 CVCC3 4kV+
I/O
pull up
See SC2_CFG1 register:
If SC2_FULL bit = 0, CIO pin for SC3 interface.
If SC2_FULL bit = 1, CC4 pin for SC2 interface.
5 CVCC4 4kV+ PWR VCC pin for SC4 interface.
6 CRST4 CVCC4 4kV+ O RST pin for SC4 interface.
7 CCLK4 CVCC4 4kV+ O CCLK pin for SC4 interface.
8 CIO4 CVCC4 4kV+
I/O
pull up
CIO pin for SC4 interface.
9 CIO5 CVCC5 4kV+
I/O
pull up
CIO pin for SC5 interface.
10 CCLK5 CVCC5 4kV+ O CCLK pin for SC5 interface.
11 CRST5 CVCC5 4kV+ O RST pin for SC5 interface.
12 CVCC5 4kV+ PWR VCC pin for SC5 interface.
13 CC81 CVCC1 4kV+
I/O
pull up
CC8 pin for SC1 interface.
14 CC41 CVCC1 4kV+
I/O
pull up
CC4 pin for SC1 interface.
15 CIO1 CVCC1 4kV+
I/O
pull up
CIO pin for SC1 interface.
16 CCLK1 CVCC1 4kV+ O CCLK pin for SC1 interface.
17 CRST1 CVCC1 4kV+ O RST pin for SC1 interface.
18 CVCCIN1 4kV+ PWR This pin must be connected to CVCC1 pins next to the package.
19 CPRES1 VCC 4kV+
I
pull up
Card presence for SC1 interface.
An internal pull up to VCC can be activated in the pad if necessary using
PULLUP1 bit in SC1_CFG1 register (activated by default).
20 CVCC1 4kV+ PWR
VCC pin for SC1 interface.
The two CVCC1 pins are connected together near the package. Only one
wire goes to the smart card connector. The reason of two CVCC1 pins is
to reduce noise.
21 CVCC1 4kV+ PWR VCC pin for SC1 interface.