C8051F023R Silicon Laboratories Inc, C8051F023R Datasheet - Page 230

IC 8051 MCU 64K FLASH 64TQFP

C8051F023R

Manufacturer Part Number
C8051F023R
Description
IC 8051 MCU 64K FLASH 64TQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F02xr
Datasheets

Specifications of C8051F023R

Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
32
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x8b, 8x10b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-TQFP, 64-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
336-1035-2
C8051F020/1/2/3
22.1.4. Mode 3: Two 8-bit Counter/Timers (Timer 0 Only)
Timer 0 and Timer 1 behave differently in Mode 3. Timer 0 is configured as two separate 8-bit counter/timers held in
TL0 and TH0. The counter/timer in TL0 is controlled using the Timer 0 control/status bits in TCON and TMOD:
TR0, C/T0, GATE0 and TF0. It can use either the system clock or an external input signal as its timebase. The timer
in the TH0 register is restricted to a timer function sourced by the system clock. TH0 is enabled using the Timer 1 run
control bit TR1. TH0 sets the Timer 1 overflow flag TF1 on overflow and thus controls the Timer 1 interrupt.
Timer 1 is inactive in Mode 3, so with Timer 0 in Mode 3, Timer 1 can be turned off and on by switching it into and
out of its Mode 3. When Timer 0 is in Mode 3, Timer 1 can be operated in Modes 0, 1 or 2, but cannot be clocked by
external signals nor set the TF1 flag and generate an interrupt. However, the Timer 1 overflow can be used to gener-
ate the baud clock for UART0 and/or UART1. Refer to
“21. UART1” on page 215
230
SYSCLK
/INT0
T0
Crossbar
Figure 22.4. T0 Mode 3 (Two 8-bit Timers) Block Diagram
GATE0
12
for information on configuring Timer 1 for baud rate generation.
0
1
M
T
4
TR0
CKCON
M
T
2
0
1
M
T
1
M
T
0
Rev. 1.4
TR1
G
A
T
E
1
C
T
1
/
M
T
1
1
TMOD
M
T
1
0
G
A
T
E
0
Section “20. UART0” on page 205
C
T
0
/
M
T
0
1
M
T
0
0
(8 bits)
(8 bits)
TH0
TL0
TR1
TR0
TF1
TF0
IE1
IT1
IE0
IT0
and
Interrupt
Interrupt
Section

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