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AT89C5131A-RDTIM Datasheet(PDF) 16 Page - ATMEL Corporation

No. de pieza AT89C5131A-RDTIM
Descripción Electrónicos  8-bit Flash Microcontroller with Full Speed USB Device
PDF  184 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89C5131A-RDTIM Datasheet(HTML) 16 Page - ATMEL Corporation

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AT89C5130A/31A-M
4337C–USB–02/05
Registers
Table 14. CKCON0 (S:8Fh)
Clock Control Register 0
Reset Value = 0000 0000b
765
43210
-
WDX2
PCAX2
SIX2
T2X2
T1X2
T0X2
X2
Bit Number
Bit
Mnemonic Description
7-
Reserved
The value read from this bit is always 0. Do not set this bit.
6WDX2
Watchdog Clock
This control bit is validated when the CPU clock X2 is set. When X2 is low,
this bit has no effect.
Clear to select 6 clock periods per peripheral clock cycle.
Set to select 12 clock periods per peripheral clock cycle.
5PCAX2
Programmable Counter Array Clock
This control bit is validated when the CPU clock X2 is set. When X2 is low,
this bit has no effect.
Clear to select 6 clock periods per peripheral clock cycle.
Set to select 12 clock periods per peripheral clock cycle.
4SIX2
Enhanced UART Clock (Mode 0 and 2)
This control bit is validated when the CPU clock X2 is set. When X2 is low,
this bit has no effect.
Clear to select 6 clock periods per peripheral clock cycle.
Set to select 12 clock periods per peripheral clock cycle.
3T2X2
Timer2 Clock
This control bit is validated when the CPU clock X2 is set. When X2 is low,
this bit has no effect.
Clear to select 6 clock periods per peripheral clock cycle.
Set to select 12 clock periods per peripheral clock cycle.
2T1X2
Timer1 Clock
This control bit is validated when the CPU clock X2 is set. When X2 is low,
this bit has no effect.
Clear to select 6 clock periods per peripheral clock cycle.
Set to select 12 clock periods per peripheral clock cycle.
1T0X2
Timer0 Clock
This control bit is validated when the CPU clock X2 is set. When X2 is low,
this bit has no effect.
Clear to select 6 clock periods per peripheral clock cycle.
Set to select 12 clock periods per peripheral clock cycle.
0X2
System Clock Control bit
Clear to select 12 clock periods per machine cycle (STD mode, FCPU = FPER =
F
OSC/2).
Set to select 6 clock periods per machine cycle (X2 mode, F
CPU = FPER = FOSC).



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