89C5121-SK1 Atmel, 89C5121-SK1 Datasheet - Page 35

• 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

Other Features
Clock
Alternate Card
4164G–SCR–07/06
The Ck-ISO input must be in the range 1 - 5 MHz according to ISO7816.
The ISO Clock diagram and the configuration examples are shown in Figure 20.
Figure 21. Clock Diagram of the SCIB Block
Table 13. Examples of Settings for Clocks
A second card named "Alternate card" can be controlled.
The Clock signal CCLK1 can be adapted to the XTAL frequency. Thanks to the clock
prescaler which can divide the frequency by 1, 2, 4 or 8. The bits ALTKPS0 and
ALTKPS1 in SCSR Register are used to set this factor.
Xtal ( MHz)
14.7456
11.059
16
20
4
4
8
FCLK_CPU
FCLK_Periph
X2 CKCON0
1 (mode X2)
0
1
0
0
0
0
CKCON 1.3
SCX2
2
1
+ FCLK Periph
FCLK Cpu
Reset value = 1
( MHz)
5.5295
7.3728
10
2
4
8
8
1
0
SCX2
Clk_cpu
Clk_iso
0
0
1
1
1
1
1
F4_8MHz
A/T8xC5121
SCIB
(1 to 5 MHz)
Clk_ iso
2.7648
3.6864
2
4
4
4
5
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