HD64F3644HV Renesas Electronics America, HD64F3644HV Datasheet - Page 360
HD64F3644HV
Manufacturer Part Number
HD64F3644HV
Description
IC H8/3644 MCU FLASH 32K 64QFP
Manufacturer
Renesas Electronics America
Series
H8® H8/300Lr
Datasheet
1.HD64F3644HV.pdf
(551 pages)
Specifications of HD64F3644HV
Core Processor
H8/300L
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI
Peripherals
PWM, WDT
Number Of I /o
53
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
64-QFP
Package
64PQFP
Family Name
H8
Maximum Speed
8 MHz
Operating Supply Voltage
3.3|5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
45
Interface Type
SCI
On-chip Adc
8-chx8-bit
Number Of Timers
4
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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Section 10 Serial Communication Interface
3. Break detection and processing
4. Mark state and break detection
5. Receive error flags and transmit operation (synchronous mode only)
6. Receive data sampling timing and receive margin in asynchronous mode
Rev. 6.00 Sep 12, 2006 page 338 of 526
REJ09B0326-0600
When a framing error is detected, a break can be detected by reading the value of the RXD pin
directly. In a break, the input from the RXD pin becomes all 0s, with the result that bit FER is
set and bit PER may also be set.
SCI3 continues the receive operation even after receiving a break. Note, therefore, that even
though bit FER is cleared to 0 it will be set to 1 again.
When bit TE is cleared to 0, the TXD pin functions as an I/O port whose input/output direction
and level are determined by PDR and PCR. This fact can be used to set the TXD pin to the
mark state, or to detect a break during transmission.
To keep the communication line in the mark state (1 state) until bit TE is set to 1, set PCR = 1
and PDR = 1. Since bit TE is cleared to 0 at this time, the TXD pin functions as an I/O port
and 1 is output.
To detect a break during transmission, clear bit TE to 0 after setting PCR = 1 and PDR = 0.
When bit TE is cleared to 0, the transmission unit is initialized regardless of the current
transmission state, the TXD pin functions as an I/O port, and 0 is output from the TXD pin.
When a receive error flag (OER, PER, or FER) is set to 1, transmission cannot be started even
if bit TDRE is cleared to 0. The receive error flags must be cleared to 0 before starting
transmission.
Note also that receive error flags cannot be cleared to 0 even if bit RE is cleared to 0.
In asynchronous mode, SCI3 operates on a basic clock with a frequency 16 times the transfer
rate. When receiving, SCI3 performs internal synchronization by sampling the falling edge of
the start bit with the basic clock. Receive data is latched internally at the 8th rising edge of the
basic clock. This is illustrated in figure 10.26.
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