HD6417727F160V Renesas Electronics America, HD6417727F160V Datasheet - Page 361

• Manufacturer Part Number: HD6417727F160V
• Description: MPU 3V 16K PB-FREE 240-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417727F160V

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 160MHz
• Connectivity: FIFO, SCI, SIO, SmartCard, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 104
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.7 V ~ 2.05 V
• Data Converters: A/D 6x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 240-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

12.2.5
The individual memory control register (MCR) is a 16-bit read/write register that specifies RAS
and CAS timing and burst control for synchronous DRAM (areas 2 and 3), specifies address
multiplexing, and controls refresh. This enables direct connection of synchronous DRAM without
external circuits.
The MCR is initialized to H'0000 by power-on resets, but is not initialized by manual resets or
standby mode. The bits TPC1 to TPC0, RCD1 to RCD0, TRWL1 to TRWL0, TRAS1 to TRAS0,
AMX3 to AMX0, and are written to at the initialization after a power-on reset and are not then
modified again. When RFSH and RMODE are written to, write the same values to the other bits.
When using synchronous DRAM, do not access areas 2 and 3 until this register is initialized.
Bits 15 and 14—RAS Precharge Time (TPC1, TPC0): These bits set the minimum number of
cycles until output of the next bank-active command after precharge, when the synchronous
DRAM interface is selected for external memory. However, the number of cycles inserted
immediately after the precharge all banks (PALL) command is issued when performing auto-
refresh is one fewer than the number of cycles during normal operation.
Bit 15:
TPC1
0
1
Note: * Immediately after the precharge all banks (PALL) command is issued when performing
Initial value:
R/W: R/W
auto-refresh.
Bit:
Individual Memory Control Register (MCR)
Bit 14:
TPC0
0
1
0
1
TPC1 TPC0 RCD1 RCD0 TRWL
15
0
R/W
14
0
Description
Normal Operation
1 cycle
2 cycles
3 cycles
4 cycles
R/W
13
0
R/W
12
0
(Initial value) 0 cycle
R/W
11
1
0
TRWL
R/W
10
0
0
TRAS
Immediately After
Precharge Command*
1 cycle
2 cycles
3 cycles
R/W
9
1
0
TRAS
R/W
8
0
0
(Initial value)
Rev.6.00 Mar. 27, 2009 Page 303 of 1036
R/W
—
7
0
Section 12 Bus State Controller (BSC)
AMX3 AMX2 AMX1 AMX0 RFSH RMO
R/W
6
0
R/W
5
0
R/W
4
0
Immediately After
Self-refresh
2 cycles
5 cycles
8 cycles
11 cycles
R/W
3
0
REJ09B0254-0600
R/W
2
0
(Initial value)
R/W
DE
1
0
R/W
—
0
0