2 POWER SUPPLY, RESET, AND CLOCKS
S1C31D50/D51 TECHNICAL MANUAL
Seiko Epson Corporation
2-19
(Rev. 2.00)
Table 2.6.5 OSC1 Internal Gate Capacitance Setting
CLGOSC1.CGI1[2:0] bits
Capacitance
0x7
Max.
0x6
↑
0x5
0x4
0x3
0x2
0x1
↓
0x0
Min.
For more information, refer to “OSC1 oscillator circuit characteristics, Internal gate capacitance C
GI1
”
in the “Electrical Characteristics” chapter.
Bits 7–6
INV1B[1:0]
These bits set the oscillation inverter gain that will be applied at boost startup of the OSC1 oscillator
circuit.
Table 2.6.6 Setting Oscillation Inverter Gain at OSC1 Boost Startup
CLGOSC1.INV1B[1:0] bits
Inverter gain
0x3
Max.
0x2
↑
0x1
↓
0x0
Min.
Note: The CLGOSC1.INV1B[1:0] bits must be set to a value equal to or larger than the CLGOSC1.
INV1N[1:0] bits.
Bits 5–4
INV1N[1:0]
These bits set the oscillation inverter gain applied at normal operation of the OSC1 oscillator circuit.
Table 2.6.7 Setting Oscillation Inverter Gain at OSC1 Normal Operation
CLGOSC1.INV1N[1:0] bits
Inverter gain
0x3
Max.
0x2
↑
0x1
↓
0x0
Min.
Bits 3–2
Reserved
Bits 1–0
OSC1WT[1:0]
These bits set the oscillation stabilization waiting time for the OSC1 oscillator circuit.
Table 2.6.8 OSC1 Oscillation Stabilization Waiting Time Setting
CLGOSC1.OSC1WT[1:0] bits
Oscillation stabilization waiting time
0x3
65,536 clocks
0x2
16,384 clocks
0x1
4,096 clocks
0x0
Reserved
CLG OSC3 Control Register
Register name
Bit
Bit name
Initial
Reset
R/W
Remarks
CLGOSC3
15–12 –
0x0
–
R
–
11–10 OSC3FQ[1:0]
0x1
H0
R/WP
9
OSC3MD
0
H0
R/WP
8
–
0
–
R
7–6 –
0x0
–
R
5–4 OSC3INV[1:0]
0x3
H0
R/WP
3
OSC3STM
0
H0
R/WP
2–0 OSC3WT[2:0]
0x6
H0
R/WP
Bits 15–12 Reserved