C8051F34A-GMR Silicon Labs, C8051F34A-GMR Datasheet - Page 267
![no-image](/images/no-image-200.jpg)
C8051F34A-GMR
Manufacturer Part Number
C8051F34A-GMR
Description
8-bit Microcontrollers - MCU 48 MIPS 64KB 10ADC
Manufacturer
Silicon Labs
Datasheet
1.C8051F349-GMR.pdf
(276 pages)
Specifications of C8051F34A-GMR
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
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Bit7:
Bit6:
Bit5:
Bit4:
Bits3–1: CPS2–CPS0: PCA Counter/Timer Pulse Select.
Bit0:
Note: When the WDTE bit is set to ‘1’, the PCA0MD register cannot be modified. To change the
CIDL
R/W
Bit7
CIDL: PCA Counter/Timer Idle Control.
Specifies PCA behavior when CPU is in Idle Mode.
0: PCA continues to function normally while the system controller is in Idle Mode.
1: PCA operation is suspended while the system controller is in Idle Mode.
WDTE: Watchdog Timer Enable
If this bit is set, PCA Module 4 is used as the watchdog timer.
0: Watchdog Timer disabled.
1: PCA Module 4 enabled as Watchdog Timer.
WDLCK: Watchdog Timer Lock
This bit enables and locks the Watchdog Timer. When WDLCK is set to ‘1’, the Watchdog
Timer may not be disabled until the next system reset.
0: Watchdog Timer unlocked.
1: Watchdog Timer enabled and locked.
UNUSED. Read = 0b, Write = don't care.
These bits select the timebase source for the PCA counter
ECF: PCA Counter/Timer Overflow Interrupt Enable.
This bit sets the masking of the PCA Counter/Timer Overflow (CF) interrupt.
0: Disable the CF interrupt.
1: Enable a PCA Counter/Timer Overflow interrupt request when CF (PCA0CN.7) is set.
contents of the PCA0MD register, the Watchdog Timer must first be disabled.
*Note: External oscillator source divided by 8 is synchronized with the system clock.
CPS2
WDTE
0
0
0
0
1
1
1
1
R/W
Bit6
CPS1
WDLCK
SFR Definition 22.2. PCA0MD: PCA Mode
0
0
1
1
0
0
1
1
R/W
Bit5
C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
CPS0
0
1
0
1
0
1
0
1
R/W
Bit4
-
System clock divided by 12
System clock divided by 4
Timer 0 overflow
High-to-low transitions on ECI (max rate = system clock
divided by 4)
System clock
External clock divided by 8*
Reserved
Reserved
Rev. 1.3
CPS2
R/W
Bit3
CPS1
R/W
Bit2
Timebase
.
CPS0
R/W
Bit1
ECF
R/W
Bit0
SFR Address:
01000000
Reset Value
0xD9
267
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