HD64F7045F28V Renesas Electronics America, HD64F7045F28V Datasheet - Page 69
![IC SH2 MCU FLASH 144QFP](/photos/12/22/122272/hd64f7045f28v_sml.jpg)
HD64F7045F28V
Manufacturer Part Number
HD64F7045F28V
Description
IC SH2 MCU FLASH 144QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7040r
Specifications of HD64F7045F28V
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 Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD64F7045F28V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
HD64F7045F28V
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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4.7.3
The DC bit is set as follows depending on the specification of the CS0-CS2 bits (condition select
bits) of the DSR register.
Carry/Borrow Mode: CS2–CS0 = 000: The DC bit indicates whether a carry or borrow has
occurred from the MSB of the operation result. The guard bits have no affect on this. This mode is
the default. Figure 4.8 shows examples when carries and borrows occur.
Negative Mode: CS2–CS0 = 001: In this mode, the DC bit is the same as the MSB of the
operation result. When a result is negative, the DC bit is 1. When the result is positive, the DC bit
is 0. ALU arithmetic operations are always done in 40 bits. The sign bit indicating positive or
negative is thus the MSB included in the guard bits of the operation result rather than the MSB of
the destination operand. Figure 4.9 shows an example of distinguishing negative from positive. In
this mode, the DC bit has the same value as the condition bit N.
Example 1: Carry
Example 3: Borrow
+)
Ð)
0000 0000 0000 0000 0000 0001
0000 0000 0000 0000 0000 0001
0000 0000 0000 0000 0000 0000
0000 0000 1111 1111 1111 1111
0000 0000 0000 0000 0000 0001
0000 0001 0000 0000 0000 0000
Guard bits
Guard bits
DC Bit
Position where
carry is detected
Position where
borrow is detected
Figure 4.8 Examples of Carries and Borrows
Example 2: Carry
Example 4: Borrow
(1)
+)
Ð)
1111 1111 0111 0000 0000 0000
0011 1111 0001 0000 0000 0000
0011 1110 1000 0000 0000 0000
0000 0000 0001 0000 0000 0001
0000 0000 0001 0000 0000 0010
1111 1111 1111 1111 1111 1111
Guard bits
Guard bits
Rev. 5.00 Jun 30, 2004 page 53 of 512
Section 4 Instruction Features
Position where
carry is detected
Position where
borrow is detected
REJ09B0171-0500O
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