r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 118

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
9.2.3
Notes:
After Reset
1. Refer to Figure 9.5 Procedure for Switching from Low-Speed On-Chip Oscillator to XIN Clock for the
2. Set bits OCD1 and OCD0 to 00b before entering stop mode, high-speed on-chip oscillator mode, or low-speed
3. The OCD2 bit is set to 1 if oscillation stop is detected when the OCD0 bit is 1 (oscillation stop detection function
4. The OCD3 bit is enabled when the OCD0 bit is 1 (oscillation stop detection function enabled). Determine the
Bit
b0
b1
b2
b3
b4
b5
b6
b7
Address 0000Ah
switching procedure when the XIN clock reoscillates after the oscillation stop is detected.
on-chip oscillator mode (XIN clock stops).
enabled) and the OCD1 bit is 1 (oscillation stop interrupt enabled).
The OCD2 bit is cleared by setting the OCD1 bit to 0 (oscillation stop interrupt disabled).
state of the selected clock by reading the OCD3 bit several times.
Set the PRC0 bit in the PRCR register to 1 (write enabled) before rewriting the OCD register.
Symbol
Bit
Symbol
OCD0
OCD1
OCD2
OCD3
Oscillation Stop Detection Register (OCD)
—
—
—
—
Preliminary document
Specifications in this document are tentative and subject to change.
b7
—
0
Oscillation stop detection enable bit
Oscillation stop detection interrupt
enable bit
Oscillation stop detection flag
Oscillation stop monitor bit
Reserved
b6
—
0
Bit Name
b5
—
0
(4)
b4
—
0
(3)
(1)
OCD3
b3
0: Oscillation stop detection function disabled
1: Oscillation stop detection function enabled
0: Disabled
1: Enabled
0: Oscillating
1: Oscillation stop is detected
0: Oscillation frequency
1: Oscillation frequency
Set to 0.
0
OCD2
b2
0
(2)
OCD1
Function
b1
0


Approx. 2 MHz
Approx. 2 MHz
9. Clock Generation Circuit
OCD0
b0
0
Page 87 of 725
(2)
R/W
R/W
R/W
R/W
R/W
R