HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 442

• 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 12 Bus State Controller (BSC)
12.5.4
The number of cycles from CSn assertion to RD and WEn (BEn) assertion can be specified by
setting bits SW1 and SW0 in CSnWCR. The number of cycles from RD and WEn (BEn) negation
to CSn negation can be specified by setting bits HW1 and HW0. Therefore, a flexible interface to
an external device can be obtained. Figure 12.11 shows an example. A Th cycle and a Tf cycle are
added before and after an ordinary cycle, respectively. In these cycles, RD and WEn (BEn) are not
asserted, while other signals are asserted. The data output is prolonged to the Tf cycle, and this
prolongation is useful for devices with slow writing operations.
Rev. 1.00 Dec. 27, 2005 Page 398 of 932
REJ09B0269-0100
CSn Assert Period Expansion
Read
Write
A25 to A0
WEn (BEn)
D31 to D0
D31 to D0
Figure 12.11 CSn Assert Period Expansion
DACKn*
RD/WR
CKIO
CSn
Note: * The waveform for DACKn is when active low is specified.
RD
BS
Th
T1
T2
Tf