Z8F6401AN020SC00TR Zilog, Z8F6401AN020SC00TR Datasheet - Page 94

• Manufacturer Part Number: Z8F6401AN020SC00TR
• Description: IC ENCORE MCU FLASH 64K 44LQFP
• Manufacturer: Zilog
• Series: Encore!®r

Specifications of Z8F6401AN020SC00TR

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 31
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: Z8F6401AN020SC00T

PS017610-0404
Table 48. Watch-Dog Timer Reload High Byte Register (WDTH)
Table 47. Watch-Dog Timer Reload Upper Byte Register (WDTU)
R/W* - Read returns the current WDT count value. Write sets the desired Reload Value.
R/W* - Read returns the current WDT count value. Write sets the desired Reload Value.
RESET
RESET
FIELD
FIELD
ADDR
ADDR
BITS
BITS
R/W
R/W
Watch-Dog Timer Reload Upper, High and Low Byte Registers
Caution:
R/W*
R/W*
Reserved
These bits are reserved and must be 0.
The Watch-Dog Timer Reload Upper, High and Low Byte (WDTU, WDTH, WDTL) reg-
isters (Tables 47 through 49) form the 24-bit reload value that is loaded into the Watch-
Dog Timer when a WDT instruction executes. The 24-bit reload value is {WDTU[7:0],
WDTH[7:0], WDTL[7:0]. Writing to these registers sets the desired Reload Value. Read-
ing from these registers returns the current Watch-Dog Timer count value.
WDTU—WDT Reload Upper Byte
Most significant byte (MSB), Bits[23:16], of the 24-bit WDT reload value.
WDTH—WDT Reload High Byte
7
1
7
1
The 24-bit WDT Reload Value must not be set to a value less than
000004H
R/W*
R/W*
6
6
1
1
or unpredictable behavior may result.
R/W*
R/W*
5
5
1
1
R/W*
R/W*
4
4
1
1
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
WDTU
WDTH
FF1H
FF2H
R/W*
R/W*
3
1
3
1
R/W*
R/W*
2
1
2
1
R/W*
R/W*
1
1
1
1
Watch-Dog Timer
Z8 Encore!
R/W*
R/W*
0
1
0
1
®
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