AT83C5122_08 ATMEL [ATMEL Corporation], AT83C5122_08 Datasheet - Page 48
AT83C5122_08
Manufacturer Part Number
AT83C5122_08
Description
C51 Microcontroller with USB and Smart Card Reader Interfaces
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT83C5122_08.pdf
(208 pages)
- Current page: 48 of 208
- Download datasheet (3Mb)
USB Interface Clock
Registers
48
AT83R5122, AT8xC5122/23
The USB Interface uses two clocks :
Table 24. Clock Selection Register - CKSEL (S:85h)
Reset Value = XXXX XXX0b
Table 25. Clock Reload Register - CKRL (S:97h)
Reset Value = XXXX 1111b
Bit Number Bit Mnemonic Description
Bit Number Bit Mnemonic Description
–
–
7 - 4
7
7:1
7
3:0
-
-
0
The first one is the CPU clock used for the interface with the microcontroller,
CK_IDLE.
The second one is the CK_USB supplied from the PLL through a divider by
2.
CKRL3:0
6
6
-
-
CKS
-
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
CPU Oscillator Select Bit
Set this bit to connect CPU and Peripherals to PLL output.
Clear this to to connect CPU and Peripherals to XTAL1 clock input.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Clock Reload register
Prescaler1 value
F
ck_cpu
5
5
-
-
=[ 1 / 2*(16-CKRL)] * F
4
4
-
-
CKRL3
3
3
-
ck_XTAL1
CKRL2
2
2
-
CKRL1
1
1
-
4202F–SCR–07/2008
CKRL0
CKS
0
0
Related parts for AT83C5122_08
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Atmel CryptoMemory
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
Atmel CryptoMemory
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
Atmel CryptoMemory, 16Kbit
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontrollers
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontroller with 16/32/64/128K Bytes In-System Programmable Flash
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontroller with 16/32/64K Bytes In-System Programmable Programmable
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet: