EZ80190AZ050SC00TR Zilog, EZ80190AZ050SC00TR Datasheet - Page 51

• Manufacturer Part Number: EZ80190AZ050SC00TR
• Description: IC EZ80 ACCLAIM 50MHZ 100LQFP
• Manufacturer: Zilog

Specifications of EZ80190AZ050SC00TR

• Processor Type: eZ80
• Features: High Speed, Single-Cycle Instruction-Fetch
• Speed: 50MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

PS006614-1208
Table 10. WDT Control Register
WDT Reset Register
Table 11. WDT Reset Register
Bit
Reset
CPU Access
Note: R = Read Only; R/W = Read/Write.
Bit
Position
7
WDT_EN
6
NMI_OUT
5
RST_FLAG
[4:2]
[1:0]
WDT_PERIOD
Bit
Reset
CPU Access
Note: X = Undefined; W = Write Only.
The WDT Reset register, listed in
reset when an
can occur between the writing of the
time-out does not occur prior to completion.
Value Description
0
1
0
1
0
1
000
00
01
10
11
A5h
R/W
WDT is disabled.
WDT is enabled. When enabled, the WDT cannot be disabled
without a full-chip reset.
WDT time-out resets the CPU.
WDT time-out generates a nonmaskable interrupt (NMI) to the
CPU.
RESET caused by external full-chip reset or ZDI reset.
RESET caused by WDT time-out. This flag is set by the WDT
time-out, even if the NMI_OUT flag is set to 1. The CPU can
poll this bit to determine the source of the RESET or NMI.
Reserved.
WDT time-out period is 134,217,728 (2
WDT time-out period is 33,554,432 (2
WDT time-out period is 4,194,304 (2
WDT time-out period is 262,144 (2
value followed by
W
X
7
0
7
R/W
W
X
6
0
6
Table
0/1
W
R
X
5
5
A5h
5Ah
11, is an 8-bit Write Only register. The WDT is
value and the
is written to this register. Any amount of time
W
R
X
4
0
4
(WDT_RR = 94h)
(WDT_CTL = 93h)
W
R
X
3
0
3
18
22
) clock cycles.
5Ah
25
) clock cycles.
27
) clock cycles.
) clock cycles.
W
R
value, so long as the WDT
X
2
0
2
Product Specification
R/W
W
X
1
0
1
Watchdog Timer
R/W
W
X
0
0
0
eZ80190
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