z89136 ZiLOG Semiconductor, z89136 Datasheet - Page 56

• Manufacturer Part Number: z89136
• Description: Low-cost Dtad Controller
• Manufacturer: ZiLOG Semiconductor

Z89135/136 (ROMless)
Low-Cost DTAD Controller
Field
DSPCON (F)0CH
Z8_SCLK
DSP_Reset
DSP_Run
Reserved
IntFeedback
1-56
WDTMR (FH) 0FH
*
Note: The WDTMR Register is only accessed within 64 Z8
clock cycles after POR.
D7 D6 D5 D4 D3 D2 D1 D0
Default setting after RESET
Figure 63. Watch-Dog Timer Mode Register
76------
--5-----
---4----
----32--
------1-
-------0
Position
Table 18. DSP Control Register
(F) 0FH [Read/Write]
P R E L I M I N A R Y
(F) 0FH [Read/Write]
WDT TAP
Attrib
WDT During HALT
0 OFF
1 ON
WDT During STOP
0 OFF
1 ON
XTAL1/INT RC Select for WDT
0 On-Board RC
1 XTAL
Reserved
R/W
R/W
W
W
W
R
R
R
00
01
10
11
*
*
*
INT RC OSC External Clock
®
100 ms
15 ms
25 ms
5 ms
Value
*
0.1
00
1x
xx
0
1
0
1
1
0
1
0
Label
2.5 MHz (OSC/8)
5 MHz (OSC/4)
10 MHz (OSC/2)
Return “0”
No effect
Reset DSP
Halt_DSP
Run_DSP
Return “0”
No effect
FB_DSP_INT2
Set DSP_INT2
No effect
FB_Z8_IRQ3
Clear IRQ 3
No effect
4096 TpC
1024 TpC
256 TpC
512 TpC
DS97TAD0300
Zilog