Specifications

S1C6P466 TECHNICAL MANUAL EPSON 119
CHAPTER 9: ELECTRICAL CHARACTERISTICS
9.7 Timing Chart
System clock switching
VDC
OSCC
CLKCHG
∗
∗
2.5 msec min.
5 msec min.
∗ 1 instruction execution time or longer
In the S1C6P466, the VDC register value does not affect the VD1 voltage level. However, note that the
CPU clock cannot be switched from OSC1 to OSC3 using the CLKCHG register if the VDC register
value is "0".
Set the VDC register to "1" before switching the CPU clock from OSC1 to OSC3 in the S1C6P466.
When using the S1C6P466 as a development tool for the S1C63454/63458/63466, switch the operating
voltage using the VDC register according to the control sequence of the model (refer to the "Technical
Manual").