mc68ec060 Freescale Semiconductor, Inc, mc68ec060 Datasheet - Page 295

• Manufacturer Part Number: mc68ec060
• Description: Mc68060 Superscalar 68k Microprocessor Including The Lc060 And Ec060
• Manufacturer: Freescale Semiconductor, Inc

IEEE 1149.1 Test (JTAG) and Debug Pipe Control Modes
9-34
STATE
JTAG
TRST
TCK
TMS
CLK
TDI
NOTES:
1. Clock is shown at 2x TCK here for illustration. Any relationship may exist but 3 full rising edges of CLK should occur after JTAG
2. When JTAG goes high, the MC68060 goes from "functional with JTAG" to "functional with DEBUG". When going to DEBUG
3. Hold TRST = H across boundary to prevent PAPPLY.
4. Hold TMS = H across boundary to keep JTAG in TLR.
5. After the boundary, PAPPLY must be negated before PDISABLE negates.
goes high and before PSHIFT or PDISABLE change.
modes the JTAG package pins remap to:
TRST
TDI
TMS
TCK
Figure 9-12. Transition from JTAG to Debug Mode Timing Diagram
1
PDISABLE
PAPPLY
PTDI
PSHIFT
SeIR
2
ALL "P" signals internally negated when JTAG = low.
2
JTAG MODE
TLR
3
4
JTAG MUST BE IN TLR
3
5
TLR
M68060 USER’S MANUAL
6
4
TLR
7
8
DISABLED
9
DEBUG MODE
10
11
SHIFT
12
13
SHIFT
14
MOTOROLA
APPLY
CLK
PSHIFT
JTAG
PDISABLE
PAPPLY
PTDI
ACTION