DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 653

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

Note: * When watch mode or subactive mode is entered, set high-speed mode.
Bit
3
2
1
0
Bit Name Initial Value R/W
RFCUT
⎯
STC1
STC0
0
0
0
0
R/W
R/W
R/W
R/W
Description
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: Main clock oscillator’s built-in feedback resistor and duty
1: Main clock oscillator’s built-in feedback resistor and duty
Reserved
This bit can be read from or written to, but the write value
should always 0.
Frequency Multiplication Factor
Specify the frequency multiplication factor of the PLL circuit
incorporated into the evaluation chip. The specified
frequency multiplication factor is valid after a transition to
software standby mode.
With this LSI, the STC1 and STC0 bits must both be set to
1. After a reset, the STC1 and STC0 bits are both cleared
to 0, and so they must be set to 1.
00: × 1
01: × 2 (Setting prohibited)
10: × 4 (Setting prohibited)
11: PLL is bypassed
adjustment circuit are used
adjustment circuit are not used
Rev.7.00 Dec. 24, 2008 Page 599 of 698
REJ09B0074-0700