HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 629

• 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: -

Section 16 Serial Communication Interface with FIFO (SCIF)
From equation (1), if F = 0 and D = 0.5, the receive margin is 46.875%, as given by equation (2).
When D = 0.5 and F = 0:
M = (0.5 – 1/(2 × 16)) × 100% = 46.875% ........................................... (2)
This is a theoretical value. A reasonable margin to allow in system designs is 20% to 30%.
Notes on DMAC Usage: To use an external clock source for a synchronous clock, the external
clock should be input after SCFTDR has been updated by the DMAC and then five cycles or more
of a peripheral operating clock has passed. If a transmit clock is input within four cycles after
SCFTDR has updated, erroneous operation may occur (figure 16.20).
SCIFnCK
t
TDFE
TxD
D0
D1
D2
D3
D4
D5
D6
D7
Note: To operate on an external clock, specify t as 4 cycles or more of a peripheral operating clock.
Figure 16.20 Sample Transfer of Synchronous Clock by DMAC
Rev. 1.00 Dec. 27, 2005 Page 585 of 932
REJ09B0269-0100