HD6417720BP133BV Renesas Electronics America, HD6417720BP133BV Datasheet - Page 386

• Manufacturer Part Number: HD6417720BP133BV
• Description: SH3-DSP, WITH USB AND LCDC, PB-F
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417720BP133BV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: FIFO, I²C, IrDA, MMC, SCI, SD, SIO, SIM, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 117
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Data Converters: A/D 4x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 9 Bus State Controller (BSC)
Page 326 of 1414
Bit
12
11
10
9
Bit Name
⎯
RFSH
RMODE
PDOWN
Initial
Value
0
0
0
0
R/W
R
R/W
R/W
R
Description
Reserved
This bit is always read as 0. The write value should always
be 0.
Refresh Control
Specifies whether or not the refresh operation of the SDRAM
is performed.
0: No refresh
1: Refresh
Refresh Control
Specifies whether to perform auto-refresh or self-refresh
when the RFSH bit is 1. When the RFSH bit is 1 and this bit
is 1, self-refresh starts immediately. When the RFSH bit is 1
and this bit is 0, auto-refresh starts according to the contents
that are set in RTCSR, RTCNT, and RTCOR.
0: Auto-refresh is performed
1: Self-refresh is performed
Power-Down Mode
Specifies whether the SDRAM is entered in power-down
mode or not after the access to SDRAM is completed. If this
bit is set to 1, the CKE pin is pulled to low to place the
SDRAM to power-down mode.
0: Does not place the SDRAM in power-down mode after
1: Places the SDRAM in power-down mode after access
access completion.
completion.
SH7720 Group, SH7721 Group
R01UH0083EJ0400 Rev. 4.00
Sep 21, 2010