HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 371

• Manufacturer Part Number: HD6417712BPV
• Description: MPU 1.5/3.3V 0K PB-FREE 256-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Ethernetr

Specifications of HD6417712BPV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, Ethernet, FIFO, SCI, SIO
• Peripherals: DMA, POR, WDT
• Number Of I /o: 24
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

11.8
11.8.1
The WDT can be used to cancel standby mode with an interrupt such as an NMI. The procedure is
described below. (The WDT does not run when resets are used for canceling, so keep the RESETP
or RESETM pin low until the clock stabilizes.)
1. Before transitioning to standby mode, always clear the TME bit in WTCSR to 0. When the
2. Set the type of count clock used in the CKS2 to CKS0 bits in WTCSR and the initial values for
3. Move to standby mode by executing a SLEEP instruction to stop the clock.
4. The WDT starts counting by detecting the edge change of the NMI signal.
5. When the WDT count overflows, the CPG starts supplying the clock and the processor
6. Since the WDT continues counting from H'00, clear the STBY bit in STBCR to 0 in the
WTCNT write
WTCSR write
TME bit is 1, an erroneous reset or interval timer interrupt may be generated when the count
overflows.
the counter in WTCNT. These values should ensure that the time till count overflow is longer
than the clock oscillation settling time.
resumes operation. The WOVF flag in WTCSR is not set at this time.
interrupt processing program and this will stop the WDT. When the STBY bit remains 1, the
LSI again enters the standby mode when the WDT has counted up to H'80. This standby mode
can be canceled by power-on resets.
Address: H'A415FF84
Address: H'A415FF86
Using WDT
Canceling Standbys
Figure 11.3 Writing to WTCNT and WTCSR
15
15
H'5A
H'A5
8
8
Rev. 1.00 Dec. 27, 2005 Page 327 of 932
Section 11 On-Chip Oscillation Circuits
7
7
Write data
Write data
REJ09B0269-0100
0
0