IP2022 User’s Manual—In-System Debugging www.ubicom.com 341 INST_LO 1. 0100000
2. CPU Instruction
3. STATUS || W Break mode:
Instruction specified by the opcode
is executed. IREAD 1. 0010000
2. None
3. Data Break mode:
Read word from program flash
memory or program RAM and incre-
ment the low byte of the address
pointer. The high byte of the
address is not affected when the
low byte rolls over to 0.
In code-protect mode (i.e. CP bit =
0), only the configuration block (i.e.
FUSE0, FUSE1, and TRIM0 bits) is
available for reading. All other flash
memory bits read as zero. IWRITE 1. 0010001
2. Data
3. None Break mode:
Write word to program flash mem-
ory or program RAM and increment
address pointer. The high byte of
the address is not affected when the
low byte rolls over to 0.
Command is acknowledged but no
operation occurs in code-protect
mode (i.e. CP bit = 0). Table 5-1  ISD/ISP Command Set (continued) Command Name  Opcode (1.),
Operand (2.), Return Value (3.) Description