AT83EC5123 ATMEL Corporation, AT83EC5123 Datasheet - Page 12

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

Port 4
Port 5
12
AT8xC5122/23
Port 4 has the following functions:
Port 4 has the following configurations:
Table 5. Port 4 description
Port 5 has the following functions:
Port 5 has the following configurations:
Table 6. Port 5 description
Port
P5.0
P5.1
P5.2
P5.3
P5.4
P5.5
P5.6
P5.7
Port
P4.0
P4.1
P4.2
P4.3
P4.4
P4.5
–
–
–
–
–
–
–
–
Default function: Port 4 is an 6-bit I/O port.
Alternate functions: see table below
Default configuration: Pseudo bi-directional “Port51” digital input/output with
internal pull-ups.
Alternate configurations: See Table 5..
Default function: Port 5 is an 8-bit I/O port.
Alternate function 1: Port 5 is an 8-bit keyboard port KB0 to KB7.
Default configuration: Pseudo bi-directional “Port51” digital input/output with
internal pull-ups.
Alternate configuration: see Table 6..
Alternate Functions
Signal
MISO
MOSI
SCK
Configurations
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Push-pull
Mode 1
Description
SPI Master In Slave Out I/O
SPI Master Out Slave In I/O
SPI clock
Input MPU
Input MPU
Input MPU
Input WPD
Input WPD
Input WPD
Input WPD
Input WPD
Mode 2
Configurations
Push-pull
Push-pull
Push-pull
Mode 1
Input WPU
Input WPU
Input WPU
Input WPU
Input WPU
Input WPU
Input WPU
Input WPU
Mode 3
KB_OUT
KB_OUT
KB_OUT
Mode 2
First cluster
Second cluster
Third cluster
4202B–SCR–07/03
Input MPU
Input MPU
Input MPU
Mode 3