HD6475348R Datasheet, PDF (282/487 Pages) Hitachi Semiconductor – Single-Chip Microcomputer

The meaning of n is given by the table below:
n
CKS1 CKS0 Clock
0
0
0
ø
1
0
1
ø/4
2
1
0
ø/16
3
1
1
ø/64
The error in asynchronous mode is calculated as follows:
OSC × 10⁶
Error (%) = {
–1 × 100 }
B × 64 × 2²ⁿ × (N + 1)
268