C8051F340-GQR Silicon Laboratories Inc, C8051F340-GQR Datasheet - Page 58

• Manufacturer Part Number: C8051F340-GQR
• Description: MCU 8-Bit C8051F34x 8051 CISC 64KB Flash 3.3V/5V 48-Pin TQFP T/R
• Manufacturer: Silicon Laboratories Inc

Specifications of C8051F340-GQR

• Package: 48TQFP
• Device Core: 8051
• Family Name: C8051F34x
• Maximum Speed: 48 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 40
• Interface Type: I2C/SMBus/SPI/UART/USB
• On-chip Adc: 17-chx10-bit
• Number Of Timers: 4
• Ram Size: 4.25 KB
• Program Memory Size: 64 KB
• Program Memory Type: Flash
• Operating Temperature: -40 to 85 °C

C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
58
V
Output Voltage
VREF Short-Circuit Current
VREF Temperature Coeffi-
cient
Load Regulation
VREF Turn-on Time 1
VREF Turn-on Time 2
VREF Turn-on Time 3
Power Supply Rejection
Input Voltage Range
Input Current
ADC Bias Generator
Reference Bias Generator
DD
Bits7–3: UNUSED. Read = 00000b; Write = don’t care.
Bit3:
Bit2:
Bit1:
Bit0:
= 3.0 V; –40 to +85 °C Unless Otherwise Specified
R/W
Bit7
-
Parameter
REFSL: Voltage Reference Select.
This bit selects the source for the internal voltage reference.
0: VREF pin used as voltage reference.
1: V
TEMPE: Temperature Sensor Enable Bit.
0: Internal Temperature Sensor off.
1: Internal Temperature Sensor on.
BIASE: Internal Analog Bias Generator Enable Bit.
0: Internal Bias Generator off.
1: Internal Bias Generator on.
REFBE: Internal Reference Buffer Enable Bit.
0: Internal Reference Buffer disabled.
1: Internal Reference Buffer enabled. Internal voltage reference driven on the VREF pin.
DD
R/W
Bit6
Table 6.1. Voltage Reference Electrical Characteristics
-
used as voltage reference.
SFR Definition 6.1. REF0CN: Reference Control
R/W
Bit5
25 °C ambient
Load = 0 to 200 µA to GND
4.7 µF tantalum, 0.1 µF ceramic
bypass
0.1 µF ceramic bypass
no bypass cap
Sample Rate = 200 ksps; VREF =
3.0 V
BIASE = ‘1’
-
External Reference (REFBE = 0)
Internal Reference (REFBE = 1)
R/W
Bit4
-
Conditions
Bias Generators
Rev. 1.3
REFSL
R/W
Bit3
TEMPE
R/W
Bit2
2.38
Min
0
BIASE
R/W
Bit1
2.44
Typ
100
140
1.5
15
20
10
12
40
2
REFBE
R/W
Bit0
Max
2.50
V
10
DD
SFR Address:
00000000
Reset Value
ppm/µA
ppm/°C
0xD1
ppm/V
Units
mA
ms
µA
µA
µA
µs
µs
V
V