C8051F342-GQ Silicon Laboratories Inc, C8051F342-GQ Datasheet - Page 265
![IC 8051 MCU FLASH 64K 32LQFP](/photos/12/18/121879/c8051f342-gq_sml.jpg)
C8051F342-GQ
Manufacturer Part Number
C8051F342-GQ
Description
IC 8051 MCU FLASH 64K 32LQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F34xr
Datasheets
1.C8051F349-GQ.pdf
(276 pages)
2.C8051F342-GQ.pdf
(1 pages)
3.C8051F347-GQ.pdf
(296 pages)
Specifications of C8051F342-GQ
Program Memory Type
FLASH
Program Memory Size
64KB (64K x 8)
Package / Case
32-LQFP
Core Processor
8051
Core Size
8-Bit
Speed
48MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
25
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 21x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
5.25 KB
Interface Type
I2C/SMBus/SPI/UART/USB
Maximum Clock Frequency
48 MHz
Number Of Programmable I/os
25
Number Of Timers
4
Operating Supply Voltage
2.7 V to 5.25 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
KSK-SL-F34X, KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F340DK
Minimum Operating Temperature
- 40 C
On-chip Adc
17-ch x 10-bit
No. Of I/o's
25
Ram Memory Size
4352Byte
Cpu Speed
48MHz
No. Of Timers
4
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
336-1748 - ADAPTER TOOLSTICK FOR C8051F34X336-1482 - DAUGHTER CARD TOOLSTCK C8051F342770-1006 - ISP 4PORT FOR SILABS C8051F MCU
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1300
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F342-GQ
Manufacturer:
SiliconL
Quantity:
1 428
Company:
Part Number:
C8051F342-GQ
Manufacturer:
SILICON
Quantity:
2 750
Company:
Part Number:
C8051F342-GQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Company:
Part Number:
C8051F342-GQ(R)
Manufacturer:
SILICO
Quantity:
1 730
Company:
Part Number:
C8051F342-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Part Number:
C8051F342-GQR
Manufacturer:
SILICON LABS/芯科
Quantity:
20 000
The WDT reset is generated when PCA0L overflows while there is a match between PCA0CPH4 and
PCA0H. Software may force a WDT reset by writing a ‘1’ to the CCF4 flag (PCA0CN.4) while the WDT is
enabled.
22.3.2. Watchdog Timer Usage
To configure the WDT, perform the following tasks:
The PCA clock source and Idle mode select cannot be changed while the WDT is enabled. The watchdog
timer is enabled by setting the WDTE or WDLCK bits in the PCA0MD register. When WDLCK is set, the
WDT cannot be disabled until the next system reset. If WDLCK is not set, the WDT is disabled by clearing
the WDTE bit.
The WDT is enabled following any reset. The PCA0 counter clock defaults to the system clock divided by
12, PCA0L defaults to 0x00, and PCA0CPL4 defaults to 0x00. Using Equation 22.4, this results in a WDT
timeout interval of 256 PCA clocks. Table 22.3 lists some example timeout intervals for typical system
clocks.
1. Disable the WDT by writing a ‘0’ to the WDTE bit.
2. Select the desired PCA clock source (with the CPS2-CPS0 bits).
3. Load PCA0CPL4 with the desired WDT update offset value.
4. Configure the PCA Idle mode (set CIDL if the WDT should be suspended while the CPU is in
5. Enable the WDT by setting the WDTE bit to ‘1’.
6. (optional) Lock the WDT (prevent WDT disable until the next system reset) by setting the
7. Write a value to PCA0CPH4 to reload the WDT.
Idle mode).
WDLCK bit to ‘1’.
Equation 22.4. Watchdog Timer Offset in PCA Clocks
Notes:
System Clock (Hz)
1. Assumes SYSCLK / 12 as the PCA clock source, and a PCA0L
2. System Clock reset frequency.
Table 22.3. Watchdog Timer Timeout Intervals
Offset
12,000,000
12,000,000
12,000,000
24,000,000
24,000,000
24,000,000
1,500,000
1,500,000
1,500,000
value of 0x00 at the update time.
32,768
32,768
32,768
C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
=
2
2
2
256 PCA0CPL4
PCA0CPL4
Rev. 1.3
255
128
255
128
255
128
255
128
32
32
32
32
+
256 PCA0L
Timeout Interval (ms)
–
12,093.75
3,093.75
24,000
524.3
264.2
65.5
33.0
32.8
16.5
67.6
8.4
4.2
1
265