Z8F0431SJ020SG Zilog, Z8F0431SJ020SG Datasheet - Page 150

• Manufacturer Part Number: Z8F0431SJ020SG
• Description: IC ENCORE XP MCU FLASH 4K 28SOIC
• Manufacturer: Zilog
• Series: Encore!®r

Specifications of Z8F0431SJ020SG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, LED, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-SOIC (7.5mm Width)
• For Use With: 770-1002 - ISP 4PORT ZILOG Z8 ENCORE! MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Other names: 269-4627-5

On-Chip Debugger Control Register Definitions
PS025111-1207
OCD Control Register
•
•
•
The OCD control register controls the state of the On-Chip Debugger. This register is used
to enter or exit DEBUG mode and to enable the
Encore!
A reset and stop function can be achieved by writing
function can be achieved by writing
a run function can be implemented by writing
returns
from issuing of the command until the OCD returns the data. The OCD reads the program
memory, calculates the CRC value, and returns the result. The delay is a function of the
program memory size and is approximately equal to the system clock period multiplied by
the number of bytes in the program memory.
DBG
DBG
DBG
Step Instruction (10H)—The step instruction command, steps one assembly instruction
at the current program counter (PC) location. If the device is not in DEBUG mode or the
Flash read protect option bit is enabled, the OCD ignores this command.
DBG
Stuff Instruction (11H)—The stuff instruction command, steps one assembly instruction
and allows specification of the first byte of the instruction. The remaining 0-4 bytes of the
instruction are read from program memory. This command is useful for stepping over
instructions where the first byte of the instruction has been overwritten by a breakpoint. If
the device is not in DEBUG mode or the Flash read protect option bit is enabled, the OCD
ignores this command.
DBG
DBG
Execute Instruction (12H)—The execute instruction command allows sending an entire
instruction to be executed to the eZ8 CPU. This command can also step over breakpoints.
The number of bytes to send for the instruction depends on the opcode. If the device is not
in DEBUG mode or the Flash read protect option bit is enabled, this command reads and
discards one byte.
DBG
DBG
®
←
→
→
←
←
←
←
←
F0830 Series device.
FFFFH
0EH
CRC[15:8]
CRC[7:0]
10H
11H
opcode[7:0]
12H
1-5 byte opcode
for the CRC value. Unlike the other OCD read commands, there is a delay
41H
to this register. If the device is in DEBUG mode,
40H
BRK
to this register.
instruction. It can also reset the Z8
81H
to this register. A reset and
Z8 Encore!
Product Specification
®
On-Chip Debugger
F0830 Series
G
o
140