MOS Integrated Circuit Data Sheet

96
µ PD17062
Example 2. GET instruction
When the 8-bit data of a peripheral register is read, the value of the eight high-order bits (DBF3 and DBF2)
of the data register does not change.
Of the 8-bit data of the data register, each bit that is not a valid peripheral register bit becomes 0 or
unpredictable. Whether the bit becomes 0 or unpredictable is decided in advance for each peripheral register.
10.4.3 State at Peripheral Register Reset
The valid bits of each peripheral register are reset as follows:
DBF3 DBF2 DBF1 DBF0
b
15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0
Peripheral register
b
7 b6 b5 b4 b3 b2 b1 b0
GET
Data buffer
8
Don't careDon't care
0 or unpredictable
0 or unpredictable
The value of the
peripheral register
is read without alteration.
Valid bits
Reset Valid bit state
Power-on Unpredictable
Clock-stop Previous state held
CE Previous state held