89C5121-SK1 Atmel, 89C5121-SK1 Datasheet - Page 24
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
89C5121-SK1
Manufacturer Part Number
89C5121-SK1
Description
KIT SMART CARD FOR AT89C5121
Manufacturer
Atmel
Type
Smart Cardr
Datasheet
1.89C5121-SK1.pdf
(115 pages)
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
T89C5121-SK1
- Current page: 24 of 115
- Download datasheet (838Kb)
Clock Prescaler
Clock Control Registers
Clock Prescaler Register
24
A/T8xC5121
Before supplying the CPU and the peripherals, the main clock is divided by a factor 2 to
30 to reduce the CPU power consumption. This factor is controlled with the CKRL
register.
Table 7. Examples of Factors
This register is used to reload the clock prescaler of the CPU and peripheral clock.
Table 8. CKRL Register
CKRL - Clock Reload Register (97h)
Reset Value = XXXX 111Xb
XTAL (MHz)
Number
7 - 4
3 - 1
Bit
7
-
0
16
16
16
16
16
16
Mnemonic
X2 CPU CKCON0
CKRL
6
-
Bit
0 (reset mode)
1 (X2 mode)
-
-
1
0
0
1
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Clock Reload Register
Prescaler value
XXXX 000Xb: CKRL=7 and Division factor equals 14
XXXX 110Xb: CKRL=6 and factor equals 2
XXXX 111Xb: CKRL=7 and division factor equals 1
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5
-
CKRL Value
4
-
07h
07h
07h
07h
06h
06h
CKRL
3
Prescaler Factor
CKRL
1
1
1
1
2
2
2
CKRL
F
1
CLK_CPU,
4164G–SCR–07/06
(MHz)
16
16
F
8
8
4
8
CLK_Periph
0
-
Related parts for 89C5121-SK1
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ATSTK600](/photos/9/20/92038/atstk600_tmb.jpg)
Part Number:
Description:
DEV KIT FOR AVR/AVR32
Manufacturer:
Atmel
Datasheet:
![U641B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
![U4082B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
![U4255BM-M](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B-P](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
![TDA4470](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
![ATF22V10B-25PC](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
![AT89C51ED2-IM](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
![AT24C01](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: