HD6417041AVF16V Renesas Electronics America, HD6417041AVF16V Datasheet - Page 72
HD6417041AVF16V
Manufacturer Part Number
HD6417041AVF16V
Description
IC SUPERH MCU ROMLESS 144QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7040r
Specifications of HD6417041AVF16V
Core Processor
SH-2
Core Size
32-Bit
Speed
28.7MHz
Connectivity
EBI/EMI, SCI
Peripherals
DMA, POR, PWM, WDT
Number Of I /o
98
Program Memory Type
ROMless
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
144-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417041AVF16V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Section 4 Instruction Features
4.7.5
When the S bit of the SR register is set to 1, the overflow prevention function is engaged for the
ALU fixed decimal point arithmetic operation executed by the DSP unit. When the operation
result overflows, the maximum (positive) or minimum (negative) value is stored.
4.8
ALU integer operations are basically 24-bit operations on the top word (the top 16 bits, or bits 16
through 31) and 8 guard bits. In ALU integer operations, the bottom word of the source operand
(the bottom 16 bits, or bits 0–15) is ignored and the bottom word of the destination operand is
cleared with zeros. When the source operand has no guard bits, the sign bit is extended to fill the
guard bits. When the destination operand has no guard bits, the top word of the operation result
(not including the guard bits) are stored in the top word of the destination register.
Integer operations are basically the same as ALU fixed decimal point arithmetic operations. There
are only two types of integer operation instructions, increment and decrement, which change the
second operand by +1 or –1. 16 bits of integer data (word data) is loaded to the DSP register and
stored in the top word. The operation is performed using the top word in the DSP register. When
there are guard bits, they are valid as well. These operations are executed in the DSP stage (the last
stage) of the pipeline.
Whenever an ALU integer arithmetic operation is executed, the DSR register’s DC, N, Z, V, and
GT bits are basically updated by the operation result. This is the same as for ALU fixed decimal
point operations.
For conditional instructions, condition bits and flags are not updated even when the specified
condition is achieved and the instruction executed. For unconditional instructions, the bits are
always updated according to the operation result. Figure 4.11 shows the ALU integer operation
flowchart.
Rev. 5.00 Jun 30, 2004 page 56 of 512
REJ09B0171-0500O
Overflow Prevention Function (Saturation Operation)
ALU Integer Operations
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