HD6473258P10 Renesas Electronics America, HD6473258P10 Datasheet - Page 78
HD6473258P10
Manufacturer Part Number
HD6473258P10
Description
IC H8 MCU OTP 32K 64DIP
Manufacturer
Renesas Electronics America
Series
H8® H8/325r
Datasheet
1.HD6413238F10.pdf
(301 pages)
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
-
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4.3.4 Internal Interrupts
Seventeen internal interrupts can be requested by the on-chip supporting modules. All of them are
masked when the I bit in the CCR is set. In addition, they can all be enabled or disabled by bits in
the control registers of the on-chip supporting modules. When one of these interrupts is accepted,
the I bit is set to 1 to mask further interrupts (except NMI).
Power can be conserved by waiting for an internal interrupt in sleep mode, in which the CPU halts
but the on-chip supporting modules continue to run. When the interrupt arrives, the CPU returns to
the program-execution state, services the interrupt, then resumes execution of the main program.
See section 12, Power-Down State for further information on the sleep mode.
The input strobe interrupt (ISI) can also be waited for in software standby mode. The chip recovers
from software standby mode when an input strobe interrupt is requested.
The internal interrupt signals received by the interrupt controller are generated from flag bits in the
registers of the on-chip supporting modules. The interrupt controller does not reset these flag bits
when accepting the interrupt.
For the vector numbers and priority order of these interrupts, see table 4-2.
Note: When disabling internal interrupts, note the following points.
1. Set the interrupt mask (I) to 1 before disabling an internal interrupt or clearing its interrupt flag.
2. If an instruction that disables or clears an internal interrupt is executed while the interrupt mask
Example: A sample program for disabling the output compare A interrupt is shown below. The
OCIAE bit in the TCR should be cleared only when I = 1, as in this example.
ORC
BCLR
ANDC
(I) is cleared to 0, and the interrupt is requested during execution of the instruction, the CPU
resolves this conflict as follows:
If one or more other interrupts are also requested, the other interrupt with the highest priority
is served.
If no other interrupt is requested, the CPU branches to the reset address.
#80, CCR
#5, @TCR
#7F, CCR
; Set I bit
; Disable output compare A interrupt
; Clear I bit
69
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