Z8F1680SH020SG Datasheet, PDF (312/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
287
21.2.4.5. Trim Bit Address 0005H
In the Trim Option Bits Register at address 0005H and shown in Table 153, all bits are
reserved.
Table 153. Trim Option Bits at 0005H (TVREF)
Bits
7
6
5
4
3
2
1
0
Field
Reserved
Reserved
Reset
U
U
U
U
U
U
U
U
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address
Information Page Memory 0025H
Note: U = Unchanged by Reset. R/W = Read/Write.
Bit
Description
[7:5]
Reserved; must be 1.
[4:0]
Reserved; must be 1.
21.2.4.6. Trim Bit Address 0006H
The Trim Option Bits Register at address 0006H, shown in Table 154, governs crystal
oscillator trim signals.
Table 154. Trim Option Bits at 0006H (TBG)
Bits
7
6
5
4
3
2
1
0
Field
X1_TRIM
X0_TRIM
Reset
U
U
U
U
U
U
U
U
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Address
Information Page Memory 0026H
Note: U = Unchanged by Reset. R/W = Read/Write.
Bit
[7:4]
X1_TRIM
[3:0]
X0_TRIM
Description
4-bit trimming signal for the 20 M crystal oscillator.
4-bit trimming signal for the 32 K second crystal oscillator.
PS025015-1212
PRELIMINARY
Flash Option Bits