HD64F36912GFH Renesas Electronics America, HD64F36912GFH Datasheet - Page 116

• Manufacturer Part Number: HD64F36912GFH
• Description: IC H8 MCU FLASH 8K 32-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300H Tinyr

Specifications of HD64F36912GFH

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 12MHz
• Connectivity: I²C, SCI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 32-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 6 Power-Down Modes
6.1.1
SYSCR1 controls the power-down modes, as well as SYSCR2.
Rev. 3.00 Sep. 14, 2006 Page 86 of 408
REJ09B0105-0300
Bit
7
6
5
4
3 to 0
Bit Name
SSBY
STS2
STS1
STS0
System Control Register 1 (SYSCR1)
Initial
Value
0
0
0
0
All 0
R/W
R/W
R/W
R/W
R/W
Description
Software Standby
Specifies the operating mode to be entered after
executing the SLEEP instruction.
0: Shifts to sleep mode.
1: Shifts to standby mode.
For details, see table 6.2.
Standby Timer Select 2 to 0
These bits set the wait time from when the system clock
oscillator starts functioning until the clock is supplied, in
shifting from standby mode, to active mode or sleep
mode. During the wait time, this LSI automatically selects
the on-chip oscillator clock as its system clock and counts
the number of wait states. Select a wait time of 6.5 ms
(oscillation stabilization time) or longer, depending on the
operating frequency. Table 6.1 shows the relationship
between the STS2 to STS0 values and the wait time.
When using an external clock, set the wait time to be
100 s or longer in the F-ZTAT version. In the masked
ROM version, the minimum value (STS2 = STS1 = STS0
= 1) is recommended.
These bits also set the wait states for external oscillation
stabilization when system clock is switched from the on-
chip oscillator clock to the external clock by user
software.
The relationship between Nwait (number of wait states for
oscillation stabilization) and Nstby (number of wait states
for recovering to the standby mode) is as follows.
Nstby
Reserved
These bits are always read as 0.
Nwait
2
Nstby