DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 660

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 20 Power-Down State
MSTCR Access from DMAC Disabled: To prevent malfunctions, MSTCR can only be accessed
from the CPU. It can be read by the DMAC, but it cannot be written by the DMAC.
20.7
Output of the system clock ( ) can be controlled by the PSTOP bit in MSTCR. When the PSTOP
bit is set to 1, output of the system clock halts and the pin is placed in the high-impedance state.
Figure 20.3 shows the timing of the stopping and starting of system clock output. When the
PSTOP bit is cleared to 0, output of the system clock is enabled. Table 20.4 indicates the state of
the pin in various operating states.
Table 20.4
Operating State
Hardware standby
Software standby
Sleep mode
Normal operation
Rev. 3.00 Mar 21, 2006 page 630 of 814
REJ09B0302-0300
pin
System Clock Output Disabling Function
Pin State in Various Operating States
Figure 20.3 Starting and Stopping of System Clock Output
MSTCR write cycle
T1
(PSTOP = 1)
T2
T3
PSTOP = 0
High impedance
Always high
System clock output
System clock output
High impedance
High impedance
High impedance
High impedance
PSTOP = 1
High impedance
MSTCR write cycle
T1
(PSTOP = 0)
T2
T3