89C5121-SK1 Atmel, 89C5121-SK1 Datasheet - Page 84

• Manufacturer Part Number: 89C5121-SK1
• Description: KIT SMART CARD FOR AT89C5121
• Manufacturer: Atmel
• Type: Smart Cardr

Specifications of 89C5121-SK1

• Contents: Board
• For Use With/related Products: AT89C5121
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: T89C5121-SK1; T89C5121-SK1

Reset Addresses
UART Output Configuration
Voltage Level
Output Enable Function
84
A/T8xC5121
On reset, the SADDR, SADEN register are initialized to 00h, i.e. the given and broad-
cast addresses are XXXX XXXXb (all don’t care bits). This ensures that the serial port is
backwards compatible with the 80C51 microcontrollers that do not support automatic
address recognition.
The I/O Ports of UART are powered by the EV
can be:
•
•
These configurations are defined with the EVAUTO and VEXT0,VEXT1 Bits of SIOCON
Register.
The UART outputs (Tx, T0) can be controlled by the Output Enable input.
The Bits PMOSEN0 and PMOSEN1 in SIOCON Register are used to control this output.
Automatically controlled by the microcontroller which adapt the power supply level
versus the OE input voltage level.
Set at three defined levels (1.8V, 2.3V or 2.8V)
(P3.3)
OE
0
1
PMOSEN0
PMOSEN0
0
1
0
1
PMOSEN1
0
1
CC
Regulator. The voltage of this regulator
SFR
Value
PMOS Command
(Active at 1)
4164G–SCR–07/06