C8051F020-TB Silicon Laboratories Inc, C8051F020-TB Datasheet - Page 266
C8051F020-TB
Manufacturer Part Number
C8051F020-TB
Description
BOARD PROTOTYPING W/C8051F020
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F020-TB
Contents
Board
Processor To Be Evaluated
C8051F02x
Interface Type
USB
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
C8051F020
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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C8051F020/1/2/3
24.1. Boundary Scan
The DR in the Boundary Scan path is an 134-bit shift register. The Boundary DR provides control and observability
of all the device pins as well as the SFR bus and Weak Pullup feature via the EXTEST and SAMPLE commands.
266
EXTEST provides access to both capture and update actions, while Sample only performs a capture.
6, 8, 10, 12, 14, 16,
7, 9, 11, 13, 15, 17,
102, 104, 106, 108,
103, 105, 107, 109,
110, 112, 114, 116
22, 24, 26, 28, 30,
23, 25, 27, 29, 31,
38, 40, 42, 44, 46,
39, 41, 43, 45, 47,
54, 56, 58, 60, 62,
55, 57, 59, 61, 63,
70, 72, 74, 76, 78,
71, 73, 75, 77, 79,
86, 88, 90, 92, 94,
87, 89, 91, 93, 95,
111, 113, 115, 117
96, 98, 100
97, 99, 101
32, 34, 36
33, 35, 37
48, 50, 52
49, 51, 53
64, 66, 68
65, 67, 69
80, 82, 84
81, 83, 85
19, 21
18, 20
Bit
0
1
2
3
4
5
Action
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Capture
Update
Table 24.1. Boundary Data Register Bit Definitions
Target
Reset Enable from MCU (C8051F021/3 devices)
Reset Enable to /RST pin (C8051F021/3 devices)
Reset input from /RST pin (C8051F021/3 devices)
Reset output to /RST pin (C8051F021/3 devices)
Reset Enable from MCU (C8051F020/2 devices)
Reset Enable to /RST pin (C8051F020/2 devices)
Reset input from /RST pin (C8051F020/2 devices)
Reset output to /RST pin (C8051F020/2 devices)
External Clock from XTAL1 pin
Not used
Weak pullup enable from MCU
Weak pullup enable to Port Pins
P0.n output enable from MCU (e.g. Bit6=P0.0, Bit8=P0.1, etc.)
P0.n output enable to pin (e.g. Bit6=P0.0oe, Bit8=P0.1oe, etc.)
P0.n input from pin (e.g. Bit7=P0.0, Bit9=P0.1, etc.)
P0.n output to pin (e.g. Bit7=P0.0, Bit9=P0.1, etc.)
P1.n output enable from MCU
P1.n output enable to pin
P1.n input from pin
P1.n output to pin
P2.n output enable from MCU
P2.n output enable to pin
P2.n input from pin
P2.n output to pin
P3.n output enable from MCU
P3.n output enable to pin
P3.n input from pin
P3.n output to pin
P4.n output enable from MCU
P4.n output enable to pin
P4.n input from pin
P4.n output to pin
P5.n output enable from MCU
P5.n output enable to pin
P5.n input from pin
P5.n output to pin
P6.n output enable from MCU
P6.n output enable to pin
P6.n input from pin
P6.n output to pin
Rev. 1.4
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