C8051F000DK-H Silicon Laboratories Inc, C8051F000DK-H Datasheet - Page 108
C8051F000DK-H
Manufacturer Part Number
C8051F000DK-H
Description
DEV KIT FOR C8051F000/F001/F002
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051F005-TB.pdf
(171 pages)
Specifications of C8051F000DK-H
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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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
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