HD64336901G Renesas Technology, HD64336901G Datasheet - Page 80
HD64336901G
Manufacturer Part Number
HD64336901G
Description
(HD64xxx Series) 16-BIT MICROCONTROLLER
Manufacturer
Renesas Technology
Datasheet
1.HD64336901G.pdf
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3.3
When the RES pin goes low, all processing halts and this LSI enters the reset. The internal state of
the CPU and the registers of the on-chip peripheral modules are initialized by the reset. To ensure
that this LSI is reset at power-up, hold the RES pin low for the specified period. To reset the chip
during operation, hold the RES pin low for the specified period. For details, refer to section 17,
Band-Gap Circuit, Power-On Reset, and Low-Voltage Detection Circuits. When the RES pin goes
high after being held low for a certain period, this LSI starts reset exception handling. The reset
exception handling sequence is shown in figure 3.1.
The reset exception handling sequence is as follows.
1. Set the I bit in the condition code register (CCR) to 1.
2. The CPU generates a reset exception handling vector address (from H'0000 to H'0001), the
Rev. 1.00, 11/03, page 52 of 376
data in that address is sent to the program counter (PC) as the start address, and program
execution starts from that address.
Reset Exception Handling
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