c8051t617 Silicon Laboratories, c8051t617 Datasheet - Page 129

• Manufacturer Part Number: c8051t617
• Description: Mixed Signal Byte-programmable Eprom Mcu
• Manufacturer: Silicon Laboratories

SFR Definition 14.15. P3: Port3
SFR Definition 14.16. P3MDIN: Port3 Input Mode
Note:
Bits7–5: Unused
Bits4–0: P3.[4:0]
Bits7–5: UNUSED. Read = 000b; Write = don’t care.
Bits4–0: Input Configuration Bits for P3.4–P3.0 (respectively).
Note:
R/W
R/W
Bit7
Bit7
-
-
Write - Output appears on I/O pins.
0: Logic Low Output.
1: Logic High Output (high impedance if corresponding P3MDOUT.n bit = 0).
Read - Always reads ‘1’ if selected as analog input in register P3MDIN. Directly reads Port
pin when configured as digital input.
0: P3.n pin is logic low.
1: P3.n pin is logic high.
Only P3.0–P3.4 are associated with Port pins on C8051T610/2/4 devices; Only P3.0 is associated with a
Port pin on C8051T611/3/5/6/7 devices.
Port pins configured as analog inputs have their weak pullup, digital driver, and digital
receiver disabled.
0: Corresponding P3.n pin is configured as an analog input.
1: Corresponding P3.n pin is not configured as an analog input.
Only P3.0–P3.4 are associated with Port pins on C8051T610/2/4 devices; Only P3.0 is associated with a
Port pin on C8051T611/3/5/6/7 devices.
R/W
R/W
Bit6
Bit6
-
-
R/W
R/W
Bit5
Bit5
-
-
P3.4
R/W
R/W
Bit4
Bit4
Rev. 0.3
P3.3
R/W
R/W
Bit3
Bit3
C8051T610/1/2/3/4/5/6/7
P3.2
R/W
R/W
Bit2
Bit2
P3.1
R/W
R/W
Bit1
Bit1
(bit addressable)
P3.0
R/W
R/W
Bit0
Bit0
SFR Address:
SFR Address:
Reset Value
Reset Value
11111111
11111111
0xB0
0xF4
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