89C5121-SK1 Atmel, 89C5121-SK1 Datasheet - Page 95

• 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

4164G–SCR–07/06
Table 69. SIOCON Register
Serial Input Output Configuration Register
Register (91h)
Reset Value = 00XX 0000b
PMSOEN1
Number
7 - 6
5 - 4
1 - 0
Bit
3
2
7
Mnemonic Description
PMOSEN1
PMOSEN0
EVAUTO
PMSOEN0
CPRES
VEXT0
VEXT1
RES
Bit
-
6
Output Enable function on Txd/P3.1 and T0/P3.4:
PMSOEN1 PMSOEN0
0
0
1
1
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Card Presence pull-up resistor
0 Internal pull-up is connected
1 Internal pull-up is disconnected
EVCC Auto setup
Set to enable the Automatic mode of EV
Clear to disable the Automatic mode of EV
EVCC voltage configuration:
VEXT0 VEXT1
0
0
1
1
5
-
0
1
0
1
0
1
0
1
Power-down, EV
EV
EV
EV
CC
CC
CC
4
-
= 1.8V
= 2.3V
= 2.7V
PMOS is always off (reset value)
PMOS is always driven according to P3.1 or P3.4 value
PMOS is driven only when OE is high
PMOS is driven only when OE is low
CPRES
CC
RES
3
is external (reset value)
CC
regulator
CC
EVAUTO
regulator
2
A/T8xC5121
VEXT0
1
VEXT1
0
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