C8051F340 Datasheet, PDF (153/282 Pages) List of Unclassifed Manufacturers – Full Speed USB Flash MCU Family

C8051F340/1/2/3/4/5/6/7
SFR Definition 15.2. XBR1: Port I/O Crossbar Register 1
R/W
R/W
WEAKPUD XBARE
Bit7
Bit6
R/W
T1E
Bit5
R/W
T0E
Bit4
R/W
ECIE
Bit3
R/W
R/W
R/W
Reset Value
PCA0ME
00000000
Bit2
Bit1
Bit0 SFR Address:
0xE2
Bit7:
Bit6:
Bit5:
Bit4:
Bit3:
Bits2–0:
WEAKPUD: Port I/O Weak Pull-up Disable.
0: Weak Pull-ups enabled (except for Ports whose I/O are configured as analog input or
push-pull output).
1: Weak Pull-ups disabled.
XBARE: Crossbar Enable.
0: Crossbar disabled; all Port drivers disabled.
1: Crossbar enabled.
T1E: T1 Enable
0: T1 unavailable at Port pin.
1: T1 routed to Port pin.
T0E: T0 Enable
0: T0 unavailable at Port pin.
1: T0 routed to Port pin.
ECIE: PCA0 External Counter Input Enable
0: ECI unavailable at Port pin.
1: ECI routed to Port pin.
PCA0ME: PCA Module I/O Enable Bits.
000: All PCA I/O unavailable at Port pins.
001: CEX0 routed to Port pin.
010: CEX0, CEX1 routed to Port pins.
011: CEX0, CEX1, CEX2 routed to Port pins.
100: CEX0, CEX1, CEX2, CEX3 routed to Port pins.
101: CEX0, CEX1, CEX2, CEX3, CEX4 routed to Port pins.
110: Reserved.
111: Reserved.
SFR Definition 15.3. XBR2: Port I/O Crossbar Register 2
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bits7–1:
Bit0:
RESERVED: Always write to 0000000b
URT1E: UART1 I/O Output Enable (C8051F340/1/4/5 Only)
0: UART1 I/O unavailable at Port pins.
1: UART1 TX1, RX1 routed to Port pins.
R/W
URT1E
Bit0
Reset Value
00000000
SFR Address:
0xE3
Rev. 0.5
153