Hitachi H8S/2215 Series Hardware Manual page 25

Section
21.1.2 Low-Power
Control Register
(LPWRCR)
21.2.2 Inputting an
External Clock
21.6.1 Connecting a
Ceramic Resonator
Figure 21.6 Connection
of Ceramic Resonator
23.3 Register States in
Each Operating Mode
24.2 Power Supply
Voltage and Operating
Frequency Range
Figure 24.1 Power
Supply Voltage and
Operating Ranges
Page
Description
Bit name amended
598
Bit Bit Name Initial Value R/W
7 to — 0
4
3 RFCUT 0
3rd line changed as follows
601
The external clock input conditions when the duty adjustment circuit is not used are shown in table
21.4. When the duty adjustment circuit is not used, note that the maximum operating frequency
depends on the external clock input waveform. For example, if t
= 6.25 ns, the maximum operating frequency becomes 13.3 MHz depending on the clcok cycle
time of 75 ns.
Condition amended
602
EXTAL48
R
f
XTAL48
642, Manual reset amendment: Register Names UCTLR to
643, UESTL1, UEDR0i, UEDR1i, UEDR2i, UEDR3i, UEDR4i,
645, UEDR5i, UIFR0 to UTSTRF, ABWCR to BCRL, FLMCR1 to
648 EBR2
(Incorrect) Initialized

(Correct)
650 Newly added to figure
(3) When USB boot program is executed by HD64F2215U
system clock
f(MHz)
16.0
13.0
0
Description
R/W These bits can be read from or written to, but the write
value should always be 0.
R/W Built-in Feedback Resistor Control:
Selects whether the oscillator's built-in feedback resistor
and duty adjustment circuit are used with external clock
input. This bit should not be accessed when a crystal
oscillator is used.
After this bit is set when using external clock input, a
transition should initially be made to software standby
mode. Switching between use and non-use of the
oscillator's built-in feedback resistor and duty adjustment
circuit is performed when the transition is made to software
standby mode.
0: System clock oscillator's built-in feedback resistor
and duty adjustment circuit are used
1: System clock oscillator's built-in feedback resistor
and duty adjustment circuit are not used
Ceramic resonator: CSTCW48M0X11
Ceramic
Resonator
R
d
Ta = 0 to 70 C
Contact the representative mentioned below for details of Rf and Rd values.
With operation of USB operating clock (48 MHz)
provided by PLL3 multiplication
PLLVcc, DrVcc, AVcc (V)
2.7 3.0 3.6
Rev. 3.0, 10/02, page xxv of lviii
= T = 31.25ns and t = t
EXL EXH EXr EXf
-R
(Murata Manufacturing Co.,Ltd.)