C8051F130 Silicon Laboratories Inc, C8051F130 Datasheet - Page 319
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C8051F130
Manufacturer Part Number
C8051F130
Description
IC 8051 MCU 128K FLASH 100TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F13xr
Specifications of C8051F130
Core Processor
8051
Core Size
8-Bit
Speed
100MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
64
Program Memory Size
128KB (128K x 8)
Program Memory Type
FLASH
Ram Size
8.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-TQFP, 100-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
336-1147
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cause auto-reloads. When DCENn is set to ‘1’, the state of the TnEX pin controls whether the counter/timer
counts up (increments) or down (decrements), and will not cause an auto-reload or interrupt event (Timer 3
23.2.3. Auto-Reload Mode
In Auto-Reload Mode, the counter/timer can be configured to count up or down and cause an interrupt/flag
to occur upon an overflow/underflow event. When counting up, the counter/timer will set its overflow/under-
flow flag (TFn) and cause an interrupt (if enabled) upon overflow/underflow, and the values in the Reload/
Capture Registers (RCAPnH and RCAPnL) are loaded into the timer and the timer is restarted. When the
Timer External Enable Bit (EXENn) bit is set to ‘1’ and the Decrement Enable Bit (DCENn) is ‘0’, a falling
edge (‘1’-to-‘0’ transition) on the TnEX pin will cause a timer reload. Note that timer overflows will also
shares the T2EX pin with Timer 2). See
to count down.
When counting down, the counter/timer will set its overflow/underflow flag (TFn) and cause an interrupt (if
enabled) when the value in the TMRnH and TMRnL registers matches the 16-bit value in the Reload/Cap-
ture Registers (RCAPnH and RCAPnL). This is considered an underflow event, and will cause the timer to
load the value 0xFFFF. The timer is automatically restarted when an underflow occurs.
Counter/Timer with Auto-Reload mode is selected by clearing the CP/RLn bit. Setting TRn to logic 1
enables and starts the timer.
In Auto-Reload Mode, the External Flag (EXFn) toggles upon every overflow or underflow and does not
cause an interrupt. The EXFn flag can be used as the most significant bit (MSB) of a 17-bit counter.
.
External Clock
SYSCLK
(XTAL1)
Figure 23.5. Tn Auto-reload (T2,3,4) and Toggle Mode (T2,4) Block Diagram
Tn
TnE
X
Crossbar
8
12
2
Crossbar
EXENn
TRn
0
1
Section 23.2.1
TMRnCF
M
T
n
1
T
M
n
0
O
G
T
n
Reload
O
T
n
E
Rev. 1.4
TCLK
D
E
C
E
n
RCAPnL
TMRnL
C8051F120/1/2/3/4/5/6/7
for information concerning configuration of a timer
0xFF
RCAPnH
TMRnH
0xFF
Toggle Logic
C8051F130/1/2/3
OVF
CP/RLn
EXENn
EXFn
C/Tn
TRn
TFn
0
1
Interrupt
(Port Pin)
Tn
319
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