Clg Oscillation Control Register - Epson S1C17M20 Technical Manual

2 POWER SUPPLY, RESET, AND CLOCKS
CLGSCLK.
CLKDIV[1:0] bits
0x3
0x2
0x1
0x0

CLG Oscillation Control Register

Register name Bit
CLGOSC 15–12 –
11
10
9
8
7–4 –
3
2
1
0
Bits 15–12 Reserved
Bit 11 EXOSCSLPC
Bit 10 OSC3SLPC
Bit 9 OSC1SLPC
Bit 8 IOSCSLPC
These bits control the clock source operations in SLEEP mode.
1 (R/W): Stop clock source in SLEEP mode
0 (R/W): Continue operation state before SLEEP
Each bit corresponds to the clock source as follows:
CLGOSC.EXOSCSLPC bit: EXOSC clock input
CLGOSC.OSC3SLPC bit: OSC3 oscillator circuit
CLGOSC.OSC1SLPC bit: OSC1 oscillator circuit
CLGOSC.IOSCSLPC bit:
Bits 7–4 Reserved
Bit 3 EXOSCEN
Bit 2 OSC3EN
Bit 1 OSC1EN
Bit 0 IOSCEN
These bits control the clock source operation.
1(R/W): Start oscillating or clock input
0(R/W): Stop oscillating or clock input
Each bit corresponds to the clock source as follows:
CLGOSC.EXOSCEN bit: EXOSC clock input
CLGOSC.OSC3EN bit:
CLGOSC.OSC1EN bit:
CLGOSC.IOSCEN bit:
2-16
Table 2.6.3 SYSCLK Clock Source and Division Ratio Settings
0x0
IOSCCLK
1/8
1/4
1/2
1/1
Bit name Initial
0x0
EXOSCSLPC
OSC3SLPC
OSC1SLPC
IOSCSLPC
0x0
EXOSCEN
OSC3EN
OSC1EN
IOSCEN
IOSC oscillator circuit
OSC3 oscillator circuit
OSC1 oscillator circuit
IOSC oscillator circuit
Seiko Epson Corporation
CLGSCLK.CLKSRC[1:0] bits
0x1 0x2
OSC1CLK OSC3CLK
1/8
Reserved
1/4
Reserved
1/2 1/2
1/1 1/1
Reset R/W
– R –
1 H0 R/W
1 H0 R/W
1 H0 R/W
1 H0 R/W
– R
0 H0 R/W
0 H0 R/W
0 H0 R/W
1 H0 R/W
0x3
EXOSCCLK
Reserved
Reserved
Reserved
1/1
Remarks
S1C17M20/M21/M22/M23/M24/M25
TECHNICAL MANUAL (Rev. 1.0)