HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 148

• Manufacturer Part Number: HD64F2638F20J
• Description: IC H8S MCU FLASH 256K 128-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2638F20J

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SmartCard
• Peripherals: Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 4 Exception Handling
4.2.3
If an interrupt is accepted after a reset but before the stack pointer (SP) is initialized, the PC and
CCR will not be saved correctly, leading to a program crash. To prevent this, all interrupt requests,
including NMI, are disabled immediately after a reset. Since the first instruction of a program is
always executed immediately after the reset state ends, make sure that this instruction initializes
the stack pointer (example: MOV.L #xx: 32, SP).
Page 98 of 1458
(1) (3) Reset exception handling vector address (when reset, (1) = H'000000,
(2) (4) Start address (contents of reset exception handling vector address)
(5)
(6)
Note: * 3 program wait states are inserted.
φ
Interrupts after Reset
RES
Address bus
RD
HWR, LWR
D15 to D0
(3) = H'000002)
Start address ((5) = (2) (4))
First program instruction
Figure 4-3 Reset Sequence (Mode 4)
(1)
*
(2)
Vector
fetch
High
*
processing
(3)
Internal
(4)
H8S/2639, H8S/2638, H8S/2636,
Prefetch of first program
instruction
REJ09B0103-0800 Rev. 8.00
H8S/2630, H8S/2635 Group
*
(5)
(6)
May 28, 2010