C8051F342-GQ Silicon Laboratories Inc, C8051F342-GQ Datasheet - Page 101

• Manufacturer Part Number: C8051F342-GQ
• Description: IC 8051 MCU FLASH 64K 32LQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F34xr

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

11.1. Power-On Reset
During power-up, the device is held in a reset state and the RST pin is driven low until V
V
typically less than 0.3 ms. Figure 11.2. plots the power-on and V
On exit from a power-on reset, the PORSF flag (RSTSRC.1) is set by hardware to logic 1. When PORSF is
set, all of the other reset flags in the RSTSRC Register are indeterminate (PORSF is cleared by all other
resets). Since all resets cause program execution to begin at the same location (0x0000) software can
read the PORSF flag to determine if a power-up was the cause of reset. The content of internal data mem-
ory should be assumed to be undefined after a power-on reset. The V
power-on reset.
Software can force a power-on reset by writing ‘1’ to the PINRSF bit in register RSTSRC.
RST
. A Power-On Reset delay (T
Logic HIGH
Logic LOW
2.70
2.4
2.0
1.0
Figure 11.2. Power-On and V
RST
C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
V
RST
PORDelay
Power-On
Reset
) occurs before the device is released from reset; this delay is
T
PORDelay
Rev. 1.3
DD
Monitor Reset Timing
DD
Monitor
Reset
VDD
monitor reset timing.
DD
monitor is enabled following a
VDD
t
DD
settles above
101