Z8F0113HJ005EG Datasheet, PDF (166/245 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F0823 Series
Product Specification
151
Bit
[7:5]
[4]
XTLDIS
Description
Reserved
These bits are reserved and must be programmed to 111 during writes and to 111 when read.
State of Crystal Oscillator at Reset
This bit only enables the crystal oscillator. Its selection as a system clock must be performed
manually.
0 = The crystal oscillator is enabled during reset, resulting in longer reset timing.
1 = The crystal oscillator is disabled during reset, resulting in shorter reset timing.
Caution: Programming the XTLDIS bit to zero on 8-pin versions of F0823 Series devices pre-
vents any further communication via the debug pin due to the X_IN and DBG functions being
shared on pin 2 of the 8-pin package. Do not program this bit to zero on 8-pin devices unless
no further debugging or Flash programming is required.
[3:0]
Reserved
These bits are reserved and must be programmed to 1111 during writes and to 1111 when read.
Trim Bit Address Space
All available trim bit addresses and their functions are listed in Tables 91 through 93.
Table 91. Trim Options Bits at Address 0000H
Bit
7
6
5
4
3
2
Field
Reserved
RESET
U
U
U
U
U
U
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address
Information Page Memory 0020H
Note: U = Unchanged by Reset. R/W = Read/Write.
1
U
R/W
0
U
R/W
Bit
Description
[7:0]
Reserved
These bits are reserved. Altering this register may result in incorrect device operation.
PS024315-1011
PRELIMINARY
Trim Bit Address Space