C8051F226-TB Silicon Laboratories Inc, C8051F226-TB Datasheet - Page 34

• Manufacturer Part Number: C8051F226-TB
• Description: BOARD PROTOTYPING W/C8051F226
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F226-TB

• Contents: Board
• Processor To Be Evaluated: C8051F22x and C8051F23x
• Interface Type: USB
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F226
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

C8051F2xx
34
Bits 7–6: UNUSED. Read = 00b; Write = don't care
Bit 5:
Bits 4–3: PRTSL1–0: Port Select Bits*.
Bits 2–0:PINSL2–0: Pin Select Bits
* Selecting a port for analog input does NOT default all pins of that port as analog input. After select-
ing a port for analog input, a pin must be selected using pin select bits (PINSL2–0). For example,
after setting the AMXEN to ‘1’, setting PRTSL1–0 to “11”, and setting PINSL2–0 to “100” P3.4 is
configured as analog input. All other Port 3 pins remain as GPIO pins. Also note that in order to use
a port pin as analog input, its input mode should be set to analog . Please see section 14.2.
R/W
Bit7
-
AMXEN enable
0: AMXEN disabled and port pins are unavailable for analog use.
1: AMXEN enabled to use/select port pins for analog use.
00: Port0 select to configure pin for analog input from this port.
01: Port1 select to configure pin for analog input from this port.
10: Port2 select to configure pin for analog input from this port.
11: Port3 select to configure pin for analog input from this port.
000: Pin 0 of selected port (above) to be used for analog input.
001: Pin 1 of selected port (above) to be used for analog input.
010: Pin 2 of selected port (above) to be used for analog input.
011: Pin 3 of selected port (above) to be used for analog input.
100: Pin 4 of selected port (above) to be used for analog input.
101: Pin 5 of selected port (above) to be used for analog input.
110: Pin 6 of selected port (above) to be used for analog input.
111: Pin 7 of selected port (above) to be used for analog input.
R/W
Bit6
-
SFR Definition 5.1. AMX0SL: AMUX Channel Select
AMXEN
R/W
Bit5
PRTSL1
R/W
Bit4
PRTSL0
Rev. 1.6
R/W
Bit3
PINSL2
R/W
Bit2
PINSL1
R/W
Bit1
PINSL0
R/W
Bit0
SFR Address:
Reset Value
00000000
0xBB