AT83EC5123 ATMEL Corporation, AT83EC5123 Datasheet - Page 10

• Manufacturer Part Number: AT83EC5123
• Description: (AT8xx512x) Smart Card Reader ICs
• Manufacturer: ATMEL Corporation

I/O Port Definition
Ports vs packages
Port 0
Port 1
10
AT8xC5122/23
Table 2. IO number vs packages
Port 0 has the following functions:
Port 0 has the following configurations:
Port 1 has the following functions:
Table 3. Port 1 description.
Port
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
VQFP64
LQFP32
PLCC28
PLCC68
–
–
–
–
–
–
–
Default function: Port 0 is an 8-bit I/O port.
Alternate function: Port 0 is also the multiplexed low-order address and data
bus during accesses to external Program and Data Memory. In this
application, it uses strong internal pull-ups when emitting 1’s and it can drive
CMOS inputs without external pull-ups.
Default configuration: open drain bi-directional I/O port. Port 0 pins that have
1’s written to them float, and in this state they can be used as high-
impedance inputs.
Configuration 2: Low speed output, “KB_OUT”
Configuration 3: Push-pull output
Default function: Only Port 1.2, P1.6 and P1.7 are standard I/O’s; the other
ports can only be activated with the SCIB function.
Alternate function and configuration: see Table 3.
Alternate Function
Signal
CIO
CC8
CPRES
CC4
CCLK
CRST
SS
P0
8
8
Description
Smart card interface function
Card I/O
Smart card interface function
Card contact 8
Smart card interface function
Card presence
Smart card interface function
Card contact 4
Smart card interface function
Card clock
Smart card interface function
Card reset
SS pin of the SPI function
P1
8
8
6
8
P2
8
8
P3
8
8
6
8
Configuration
Mode
Port51
Push-pull
Port51
Push-pull
Push-pull
Push-pull
Port51
Description
CVCC supply: inactive at reset
CVCC supply: zero level at reset
Weak & medium pull-up can be
deconnected by software
CVCC supply: zero level at reset
CVCC supply: zero level at reset
CVCC supply: zero level at reset
P4
8
8
P5
6
1
1
8
4202B–SCR–07/03
Total
46
17
13
48