HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 145

• Manufacturer Part Number: HD6477021X20V
• Description: MCU 5V 32K PB-FREE 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7020r

Specifications of HD6477021X20V

• 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 Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

In area 6, the space when A27 is 0 is allocated to address/data multiplexed I/O space when the
multiplexed I/O enable bit (IOE) of the bus control register (BCR) is 1 and external memory space
when the IOE bit is 0. When A27 is 1, it is always external memory space.
The multiplexed I/O space is a type of external memory space but the address and data are
multiplexed and output from AD15–AD0 or AD7–AD0. The bus width is 8 bits when the A14 bit
is 0 and 16 bits when the A14 bit is 1. The A23 and A22 bits are not output and the shadow is in 4-
Mbyte units. When multiplexed I/O space is accessed, the CS6 signal is valid.
In external memory space, the bus width is 8 bits when both the A27 and A14 bits are 0 and 16
bits when the A27 bit is 0 and the A14 bit is 1. When the A27 bit is 1, it is always a 16-bit space.
The A23 and A22 bits are not output and the shadow is in 4-Mbyte units. When external memory
is accessed, the CS6 signal is valid. The external memory space has a long wait function so
between 1 and 4 states can be selected for the number of long waits inserted into the bus cycle
using the area 6 long wait insertion bits (A6LW1 and A6LW0) of WCR3.
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