Specifications

II-16 EPSON S1C62N82 TECHNICAL SOFTWARE
CHAPTER 3: PERIPHERAL CIRCUITS (Oscillation Circuit)
PERIPHERAL CIRCUITS
Details on how to control the S1C62N82 peripheral circuit is
given in this chapter.
Oscillation Circuit
S1C62N82 has two built-in oscillation circuits (OSC1 and
OSC3).
When processing of S1C62A82 requires high-speed opera-
tions, the CPU's operating clock should be switched from
OSC1 to OSC3.
CHAPTER 3
3.1
Oscillation circuit
memory map
Table 3.1.1 I/O memory map
Address Comment
Register
D3 D2 D1 D0 Name SR 1 0
0FCH
CLKCHG OSCC 0 IOC CLKCHG
OSCC
0
IOC
0
0
0
CPU clock switch
OSC3 oscillator ON/OFF
I/O port P00–P03 Input/Output
OSC3
ON
Output
OSC1
OFF
Input
R/WR/W R
*5
*1 Initial value following initial reset
*2 Not set in the circuit
*3 Undefined
*4 Reset (0) immediately after being read
*5 Always 0 when being read
*6 Refer to main manual