dsp56800e Freescale Semiconductor, Inc, dsp56800e Datasheet - Page 341

• Manufacturer Part Number: dsp56800e
• Description: 16-bit Digital Signal Controller Core
• Manufacturer: Freescale Semiconductor, Inc

11.5.2.2
Figure 11-15 shows the programming models for the core JTAG registers. There are 2 read/write registers
in the JTAG port: the IR, and the core Bypass Register. A third register, the Core Identification Register, is
read only.
11.5.2.3
A block diagram of the JTAG port is shown in Figure 11-16.
Freescale SemiconductorJTAG and Enhanced On-Chip Emulation (Enhanced OnCE)
BYPASS—(IR = $F)
Core JTAG Bypass
Core Identification
Reset = Core ID
INSTRUCTION
ID—(IR = $2)
Core JTAG
Read/Write
Reset = $2
Reset = $0
Instruction
Core JTAG Programming Model
Core JTAG Port Block Diagram
Register
Register
Register
Read
B3 B2 B1 B0
3
31
15
0
Figure 11-15.
2
30
14
1
29
13
0
28
12
JTAG Port Programming Model
27
11
26
10
25
9
24
8
23
7
22
6
21
5
20
4
19
3
18
2
JTAG Port
17
1
16
11-29
0