M-V850E-IA4 Renesas Electronics America, M-V850E-IA4 Datasheet - Page 168

• Manufacturer Part Number: M-V850E-IA4
• Description: KIT EVAL V850E IA4 UPD70F3186
• Manufacturer: Renesas Electronics America

Specifications of M-V850E-IA4

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

166
(5) Oscillation stabilization time select register (OSTS)
Cautions 1. The wait time does not include the time until the clock oscillation starts (“a” in the figure
Remark f
The OSTS register selects the oscillation stabilization time until the oscillation stabilizes after the STOP mode
is released by interrupt request.
This register can be read or written in 8-bit units.
Reset sets this register to 04H.
2. The default value of the OSTS register after reset is 04H. If an 8 MHz resonator is used,
3. Be sure to clear bits 4 to 7 to “0”.
X
: Oscillation frequency
OSTS
After reset: 04H
below) following release of the STOP mode.
therefore, the oscillation stabilization time is about 2 ms. Half the oscillation stabilization
time is consumed by waiting for the lockup of PLL. Therefore, the actual stabilization time
of the resonator is about 1 ms.
oscillation stabilization time is secured during the active period of the reset signal. To
release the STOP mode by an interrupt input other than RESET input, the oscillation
stabilization time is determined by the set value of the OSTS register. Therefore, set a
time twice as long as that required for the resonator to stabilize to the OSTS register
(because half the oscillation stabilization time is the stabilization time of PLL).
OSTS3
0
0
0
0
0
1
OSTS2
R/W
Other than above
Voltage waveform X2 pin
0
1
1
1
1
0
CHAPTER 5 CLOCK GENERATOR
Address: FFFFF6C0H
OSTS1
CV
User’s Manual U16543EJ4V0UD
0
0
1
1
0
DD
0
OSTS0
When releasing reset, therefore, make sure that the
mode release
0
0
1
0
1
0
STOP
OSTS3
a
2
2
2
2
2
Setting prohibited
14
15
16
17
18
/f
/f
/f
/f
/f
X
X
X
X
X
(2.05 ms)
(4.10 ms)
(8.19 ms)
(16.4 ms)
(32.8 ms)
stabilization time (f
Selection of oscillation
OSTS2
OSTS1
X
= 8 MHz)
OSTS0