HD6473258P10 Renesas Electronics America, HD6473258P10 Datasheet - Page 71

• Manufacturer Part Number: HD6473258P10
• Description: IC H8 MCU OTP 32K 64DIP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/325r

Specifications of HD6473258P10

• Core Processor: H8/300
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: SCI, UART/USART
• Number Of I /o: 53
• 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: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 64-DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Peripherals: -

The RES pin should be held low when power is switched off, as well as when power is switched
on.
Figure 4-1 indicates the timing of the reset sequence when the vector table and reset routine are
located in on-chip ROM. Figure 4-2 indicates the timing when they are in off-chip memory.
(1)
(2)
(3)
(4)
The value at the mode pins (MD
control register (MDCR).
In the condition code register (CCR), the I bit is set to 1 to mask interrupts.
The registers of the I/O ports and on-chip supporting modules are initialized.
The CPU loads the program counter with the first word in the vector table (stored at
addresses H’0000 and H’0001) and starts program execution.
RES
Internal address
bus
Internal Read
signal
Internal Write
signal
Internal data bus
(16 bits)
Ø
Figure 4-1. Reset Sequence (Mode 2 or 3, Reset Routine in On-Chip ROM)
(1) Reset vector address (H'0000)
(2) Starting address of reset routine (contents of H'0000–H'0001)
(3) First instruction of reset routine
1
and MD
0
62
) is latched in bits MDS1 and MDS0 of the mode
Vector
fetch
(2)
(1)
Internal
processing
Figure. 4-1
(3)
(2)
Instruction
prefetch