HD6417020SX20IV Renesas Electronics America, HD6417020SX20IV Datasheet - Page 124

• Manufacturer Part Number: HD6417020SX20IV
• Description: SH 1 CORE 32B MPU, 20MHZ/5V, 100
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7020r

Specifications of HD6417020SX20IV

• Core Processor: SH-1
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

Bit 15: WPU
0
1
• Bits 14 and 13 (long wait insertion in areas 0 and 2, bits 1, 0 (A02LW1 and A02LW0)):
Bit 14: A02LW1 Bit 13: A02LW0 Description
0
1
• Bits 12 and 11 (long wait insertion in area 6, bits 1, 0 (A6LW1 and A6LW0)): A6LW1 and
Bit 12: A6LW1
0
1
• Bits 10–0 (reserved): These bits always read as 0. The write value should always be 0.
8.2.5
The DRAM area control register (DCR) is a 16-bit read/write register that selects the type of
DRAM control signal, the number of precharge cycles, the burst operation mode and the use of
address multiplexing. DCR settings are valid only when the DRAME bit of BCR is set to 1. It is
initialized to H'0000 by a power-on reset, but is not initialized by a manual reset or by the standby
mode.
104 RENESAS
A02LW1 and A02LW0 select the long wait states to be inserted (1–4 states) when accessing
external memory space of areas 0 and 2.
A6LW0 select the long wait states to be inserted (1–4 states) when accessing external memory
space of area 6.
DRAM Area Control Register (DCR)
Bit 11: A6LW0
0
1
0
1
0
1
0
1
Description
WAIT pin is not pulled up
WAIT pin is pulled up (initial value)
Description
Inserts 1 state
Inserts 2 states
Inserts 3 states
Inserts 4 states (initial value)
Inserts 1 state
Inserts 2 states
Inserts 3 states
Inserts 4 states (initial value)