Z89371 Zilog., Z89371 Datasheet - Page 17

• Manufacturer Part Number: Z89371
• Description: 16-Bit Digital Signal Processors
• Manufacturer: Zilog.

TIMING DIAGRAMS (Continued)
Z89321/371/391
16-Bit Digital Signal Processors
17
REGISTERS
CLOCK
INTERNAL
EXECUTE
RESET
EXT0-15
HALT
RAM/
RD/WR
/RESET
PA0-15
CLOCK
UO0-1
EA0-2
/DS
HSET
HHOLD
Cycle 0
RSET
RWIDTH
Cycle 1
TCY
TCY
Figure 13. RESET Timing
Cycle 2
Figure 12. HALT Timing
Tri-Stated
P R E L I M I N A R Y
RRISE
Cycle 3
Tri-Stated
Intact*
Cycle 4
Access Reset Vector
Cycle 5
* The RAM and hardware registers are left intact
during a warm reset. A cold reset will produce
random data in these locations. The status
register is set to zeroes in both cases.
Code Execution
DS97DSP0100
Zilog