89C5121-SK1 Atmel, 89C5121-SK1 Datasheet - Page 36

• 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

Card Presence Input
SCIB Reset
36
A/T8xC5121
Figure 22. Alternate Card
The internal pull-up on Card Presence input can be disconnected in order to reduce the
consumption (CPRESRES, bit 3 in PMOD0).
In this case, an external resistor (typically 1 M ) must be externally tied to
CPRES input can generate an interrupt (see Interrupt system section).
The detection level can be selected.
The SCICR register contains a reset bit. If set, this bit generates a reset of the SCI and
its registers. Table 15 shows the SCIB registers that are reseted and their reset values.
Table 14. Reset Values for SCI Registers
Register Name
SCICR
SCCON
SCISR
SCIIR
SCIER
SCSR
SCTBUF
SCRBUF
SCETU1, SCETU0
SCGT1, SCGT0
SCWT2, SCWT1, SCWT0
F
CK_IDLE
SCSR Reg.
ALTKPS0,1
PR3
1, 2, 4 or 8
F
CK_IDLE
P3.6
SCSR Reg.
SCCLK1
1
0
SCIB Reset Value (Binary)
0000 0000b
0X00 0000b
1000 0000b
0X00 0000b
0X00 0000b
XXX0 1000b
0000 0000b
0000 0000b
XXX X001b, 0111 0100b (372)
XXXX XXX0b, 0000 1100b (12)
0000 0000b, 0010 0101b, 1000 0000b (9600)
C
CRST
CIO
CCLK
CCLK1
V
CC
CPRES
SIM,SAM
CARD
4164G–SCR–07/06
V
CC
.
Main
card
Alternate
card