z8f0813 ZiLOG Semiconductor, z8f0813 Datasheet - Page 156

• Manufacturer Part Number: z8f0813
• Description: High-performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 89. Trim Options Bits at Address 0000H
Table 90. Trim Option Bits at 0001H
Trim Bit Address Space
BITS
FIELD
RESET
R/W
ADDR
Note: U = Unchanged by Reset. R/W = Read/Write.
BITS
FIELD
RESET
R/W
ADDR
Note: U = Unchanged by Reset. R/W = Read/Write.
PS024314-0308
Note:
Warning:
Trim Bit Address 0000H—Reserved
Trim Bit Address 0001H—Reserved
R/W
R/W
U
U
7
7
This bit only enables the crystal oscillator. Its selection as system clock must be done man-
ually.
0 = Crystal oscillator is enabled during reset, resulting in longer reset timing
1 = Crystal oscillator is disabled during reset, resulting in shorter reset timing
All available Trim bit addresses and their functions are listed in
Table
Reserved—Altering this register may result in incorrect device operation.
Programming the XTLDIS bit to zero on 8-pin versions of this device prevents any fur-
ther communication via the debug pin. This is due to the fact that the XIN and DBG
functions are shared on pin 2 of this package. Do not program this bit to zero on 8-pin
devices unless no further debugging or Flash programming is required.
91.
R/W
R/W
U
U
6
6
R/W
R/W
U
U
5
5
Information Page Memory 0020H
Information Page Memory 0021H
R/W
R/W
U
U
4
4
Reserved
Reserved
R/W
R/W
U
U
3
3
Z8 Encore! XP
R/W
R/W
U
U
2
2
Table 89
Product Specification
R/W
R/W
U
U
1
1
®
through
Flash Option Bits
F0823 Series
R/W
R/W
U
U
0
0
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