z86e72 ZiLOG Semiconductor, z86e72 Datasheet - Page 91

• Manufacturer Part Number: z86e72
• Description: Otp Microcontroller
• Manufacturer: ZiLOG Semiconductor

PS008704-0507
Figure 55. Watch-Dog Timer Mode Register—(F) 0FH: Write Only
OPT (0F) EF
* Default setting after reset
WDTMR (0F) FH
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
Figure 54. Option Bit Register
Port 0 (0–3) pull-up
1 pull-up active
0 pull-up inactive
Port 0 (7–4) pull-up
1 pull-up active
2 pull-up inactive
Reserved (must be 0)
Mask option for mouse trackball interface P00–P03
1 For mouse trackball interface
0 Normal
Reserved (must be 0)
WDT TAP INT RC OSC
00
01*
10
11
WDT during HALT
0 = OFF
1 = ON*
WDT during STOP
0 = OFF
1 = ON*
XTAL/INT RC Select for WDT
0 = On-Board RC*
1 = XTAL
Reserved (must be 0)
Port 2 pull-up option
1 pull-up active
0 pull-up inactive
10 ms min
80 ms min
5 ms min
20 ms min
256 TpC
1024 TpC
External Clock
OTP Microcontroller
512 TpC
4096 TpC
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