C8051F340-GQR Datasheet, PDF (156/276 Pages) Silicon Laboratories – Full Speed USB Flash MCU Family

C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
SFR Definition 15.19. P3SKIP: Port3 Skip
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reset Value
00000000
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0 SFR Address:
0xDF
Bits7–0:
P3SKIP[3:0]: Port3 Crossbar Skip Enable Bits.
These bits select Port pins to be skipped by the Crossbar Decoder. Port pins used as ana-
log inputs (for ADC or Comparator) or used as special functions (VREF input, external oscil-
lator circuit, CNVSTR input) should be skipped by the Crossbar.
0: Corresponding P3.n pin is not skipped by the Crossbar.
1: Corresponding P3.n pin is skipped by the Crossbar.
Note: P3.1–3.7 are only available on 48-pin devices.
SFR Definition 15.20. P4: Port4 Latch
R/W
P4.7
Bit7
R/W
P4.6
Bit6
R/W
P4.5
Bit5
R/W
P4.4
Bit4
R/W
P4.3
Bit3
R/W
P4.2
Bit2
R/W
P4.1
Bit1
R/W
P4.0
Bit0
Reset Value
11111111
SFR Address:
0xC7
Bits7–0:
P4.[7:0]
Write - Output appears on I/O pins.
0: Logic Low Output.
1: Logic High Output (high impedance if corresponding P4MDOUT.n bit = 0).
Read - Always reads ‘0’ if selected as analog input in register P4MDIN. Directly reads Port
pin when configured as digital input.
0: P4.n pin is logic low.
1: P4.n pin is logic high.
Note: P4 is only available on 48-pin devices.
156
Rev. 1.3