Z8F1680SH020SG Datasheet, PDF (334/412 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F1680 Series
Product Specification
309
Read Baud Reload Register (1BH). The Read Baud Reload Register command returns
the current value in the Baud Reload Register.
DBG ← 1BH
DBG → BAUD[15:8]
DBG → BAUD[7:0]
Write Test Mode Register (F0H). The Write Test Mode Register command writes the
data that follows to the Test Mode register.
DBG ← F0H
DBG ← TESTMODE[7:0]
Read Test Mode Register (F1H). The Read Test Mode Register command returns the
current value in the Test Mode register.
DBG ← F1H
DBG → TESTMODE[7:0]
Write Option Bit Registers (F2H). The Write Option Bit Registers command is used to
write to the option bit configuration registers. The option bit configuration registers store
the device configuration and are loaded from Flash every time the Z8 Encore! XP F1680
Series is reset. The registers may be temporarily written using this OCD command to test
peripherals without having to program the Flash Information Area and resetting the Z8
Encore! XP F1680 Series. The ZilogUserSel bit selects between Zilog option bits (1) and
user option bits (0).
DBG ← F2H
DBG ← {ZilogUserSel,1’b0,OptAddr[4:0]}
DBG ← OptData[7:0]
Read Option Bit Registers (F3H). The Read Option Bit Registers command is used to
read the option bit registers that store the device configuration that is read out of flash
when the Z8 Encore! XP F1680 Series is reset. The ZilogUserSel bit selects between read-
ing Zilog option bits (1) or user option bits (0).
DBG ← F1H
DBG ← {ZilogUserSel,1’b0,OptAddr[4:0]}
DBG → OptData[7:0]
23.4. On-Chip Debugger Control Register Definitions
This section defines the features of the following On-Chip Debugger Control registers.
OCD Control Register: see page 310
OCD Status Register: see page 312
Line Control Register: see page 313
Baud Reload Register: see page 314
PS025015-1212
PRELIMINARY
On-Chip Debugger