C8051F005 Silicon Laboratories Inc, C8051F005 Datasheet - Page 108

• Manufacturer Part Number: C8051F005
• Description: IC 8051 MCU 32K FLASH 64TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F00xr

Specifications of C8051F005

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: 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: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x12b, 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: -

WEAKPUD
Bit7:
Bit6:
Bits5-1: UNUSED. Read = 00000b, Write = don’t care.
Bit0:
Example Usage of XBR0, XBR1, XBR2:
When selected, the digital resources fill the Port I/O pins in order (top to bottom as shown in
Table 15.1) starting with P0.0 through P0.7, and then P1.0 through P1.7, and finally P2.0
through P2.7. If the digital resources are not mapped to the Port I/O pins, they default to their
matching internal Port Register bits.
Example1: If XBR0 = 0x11, XBR1 = 0x00, and XBR2 = 0x40:
P0.0=SDA, P0.1=SCL, P0.2=CEX0, P0.3=CEX1, P0.4 … P2.7 map to corresponding Port I/O.
Example2: If XBR0 = 0x80, XBR1 = 0x04, and XBR2 = 0x41:
P0.0=CP0, P0.1=/INT0, P0.2 = CNVSTR, P0.3 … P2.7 map to corresponding Port I/O.
R/W
Bit7
0: Weak Pull-ups Enabled (except for Ports whose I/O are configured as push-pull)
1: Weak Pull-ups Disabled
0: Crossbar Disabled
1: Crossbar Enabled
CNVSTE: ADC Convert Start Input Enable Bit
0: CNVSTR unavailable at Port pin.
1: CNVSTR routed to Port Pin.
WEAKPUD: Port I/O Weak Pull-up Disable Bit
XBARE: Crossbar Enable Bit
XBARE
R/W
Bit6
Figure 15.5. XBR2: Port I/O CrossBar Register 2
R/W
Bit5
-
R/W
Bit4
-
Rev. 1.7
R/W
Bit3
-
R/W
Bit2
-
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
R/W
Bit1
-
CNVSTE
R/W
Bit0
SFR Address:
Reset Value
00000000
0xE3
108