HD64F38602R Datasheet, PDF (528/552 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

Item
Page Revisions (See Manual for Details)
Section 4 Clock Pulse Generators 67 Modified
4.2.4 On-Chip Oscillator Selection
Method
…… The input level on the E7_2 pin during a reset is
pulled up or down using a resistor according to the
selected oscillator, and fixed on exit from the reset
state.
When the on-chip oscillator is selected, a resonator no
longer needs to be connected to the OSC1 and OSC2
pins. In such a case, fix the OSC1 pin to GND or leave
it open, and leave the OSC2 pin open.
Note is added.
Notes:
1. ……
2. When the on-chip debugger is connected, the value
of the resistor should be high. When not connected,
it is specified according to the selected oscillator.
Figure 4.5 Typical Connection to 68
32.768-kHz/38.4-kHz Crystal
Resonator
Modified
Frequency Manufacturer
38.4 kHz EPSON TOYOCOM CORPORATION
32.768 kHz EPSON TOYOCOM CORPORATION
C1 = C2 = 7 pF (typ.)
Products Name Equivalent Series Resistance
C-4-TYPE
30 kΩ (max.)
C-001R
35 kΩ (max.)
Note: Consult with the crystal resonator manufacturer to determine the parameters.
4.3.1 Connecting 32.768-
68
kHz/38.4-kHz Crystal Resonator
Added
1. When the resonator other than ones listed above is
used, perform matching evaluation with the crystal
resonator manufacture and connect it under the
optimum condition. Even when the resonator listed
above or the equivalent is used, as the oscillation
characteristics depend on the board specification,
perform matching evaluation on the mounting board.
2. Perform matching evaluation in the reset state (the
RES pin is low) and on exit from the reset state (the
RES pin is driven from low to high).
4.4.1 Prescaler S
71 Deleted
The output from prescaler S is shared by the on-chip
peripheral modules. The division ratio can be set
separately for each on-chip peripheral function.
Rev. 3.00 May 15, 2007 Page 496 of 516
REJ09B0152-0300