HD6417720BP133BV Renesas Electronics America, HD6417720BP133BV Datasheet - Page 388

• 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)
9.4.5
RTCSR specifies various items about refresh for SDRAM.
When RTCSR is written, the upper 16 bits of the write data must be H'A55A to cancel write
protection.
Page 328 of 1414
Bit
31 to 8 ⎯
7
6
5
4
3
Bit Name
CMF
CMIE
CKS2
CKS1
CKS0
Refresh Timer Control/Status Register (RTCSR)
Initial
Value
All 0
0
0
0
0
0
R/W
R
R/W
R/W
R/W
R/W
R/W
Description
Reserved
These bits are always read as 0. The write value should
always be H'A55A00.
Compare Match Flag
Indicates that a compare match occurs between the refresh
timer counter (RTCNT) and refresh time constant register
(RTCOR). This bit is set or cleared in the following
conditions.
0: Clearing condition: When 0 is written in CMF after reading
1: Setting condition: When the condition RTCNT = RTCOR is
Compare Match Interrupt Enable
Enables or disables a CMF interrupt request when the CMF
bit of RTCSR is set to 1.
0: Disables the CMF interrupt request
1: Enables the CMF interrupt request
Clock Select
Select the clock input to count-up the refresh timer counter
(RTCNT).
000: Stop the counting-up
001: Bφ/4
010: Bφ/16
011: Bφ/64
100: Bφ/256
101: Bφ/1024
110: Bφ/2048
111: Bφ/4096
out RTCSR during CMF = 1.
satisfied.
SH7720 Group, SH7721 Group
R01UH0083EJ0400 Rev. 4.00
Sep 21, 2010