HD6477021X20V Renesas Electronics America, HD6477021X20V Datasheet - Page 444

• 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: -

4. You cannot write in the page programming mode. Always set the equipment to the byte
5. The capacity of the on-chip ROM is 32 kbytes, so the data of PROM writer addresses
6. When write errors occur on consecutive addresses, stop writing. Check to see if there are any
16.3.4
After programming, we recommend letting the device stand at high temperature (125–150 C) for
24–48 hours to increase the reliability of data retention. Letting it stand at high temperature is a
type of screening method that can get rid of initial data retention defects of the on-chip PROM's
memory cell within a short period of time. Figure 16.6 shows the flow from programming of the
on-chip PROM, including screening, to mounting on the device board.
If abnormalities are found when the program is written and verified or the program is read and
checked after the writing/verification or letting the chip stand at high temperature, contact
Hitachi's engineering departments.
programming mode.
H'08000–H'1FFFF should be H'FF. Always set the range for PROM addresses to H'0000–
H'7FFF.
abnormalities in the EPROM writer and socket adapter.
Reliability After Writing
high temperature environment
Let stand in nonconductive,
(125–150 C, 24–48 hours)
Data read and verification
Writing and verification
Mount on board
(V
Figure 16.6 Screening Flow
of program
CC
= 5.0 V)
Flow chart
from figure 16.4
RENESAS 429