HD6473837FV Renesas Electronics America, HD6473837FV Datasheet - Page 72
HD6473837FV
Manufacturer Part Number
HD6473837FV
Description
IC H8/3837 MCU FLASH 100QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Lr
Datasheet
1.HD6473837HV.pdf
(562 pages)
Specifications of HD6473837FV
Core Processor
H8/300L
Core Size
8-Bit
Speed
5MHz
Connectivity
SCI
Peripherals
LCD, PWM
Number Of I /o
84
Program Memory Size
60KB (60K x 8)
Program Memory Type
OTP
Eeprom Size
-
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 12x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
100-BQFP
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6473837FV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
Part Number:
HD6473837FV
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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2.9.2
The BSET, BCLR, BNOT, BST, and BIST instructions read one byte of data, modify the data,
then write the data byte again. Special care is required when using these instructions in cases
where two registers are assigned to the same address, in the case of registers that include write-
only bits, and when the instruction accesses an I/O.
Order of Operation
1
2
3
Bit Manipulation in Two Registers Assigned to the Aame Address
Example 1: Timer load register and timer count bit manipulation
Figure 2.23 shows an example in which two timer registers share the same address. When a bit
manipulation instruction accesses the timer load register and timer counter of a reloadable timer,
since these two registers share the same address, the following operations take place.
Order of Operation
1
2
3
The timer counter is counting, so the value read is not necessarily the same as the value in the
timer load register. As a result, bits other than the intended bit in the timer load register may be
modified to the timer counter value.
Read
Modify
Write
Read
Modify
Write
Count clock
Notes on Bit Manipulation
Figure 2.23 Timer Configuration Example
Operation
Read byte data at the designated address
Modify a designated bit in the read data
Write the altered byte data to the designated address
Operation
Timer counter data is read (one byte)
The CPU modifies (sets or resets) the bit designated in the instruction
The altered byte data is written to the timer load register
Timer load register
Timer counter
Reload
R
W
Internal bus
R:
W:
Read
Write
55
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