HD64F3337YCP16 Renesas Electronics America, HD64F3337YCP16 Datasheet - Page 418
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HD64F3337YCP16
Manufacturer Part Number
HD64F3337YCP16
Description
IC H8 MCU FLASH 60K 84PLCC
Manufacturer
Renesas Electronics America
Series
H8® H8/300r
Specifications of HD64F3337YCP16
Core Processor
H8/300
Core Size
8-Bit
Speed
16MHz
Connectivity
Host Interface, I²C, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
74
Program Memory Size
60KB (60K x 8)
Program Memory Type
FLASH
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
84-PLCC
Package
84PLCC
Family Name
H8
Maximum Speed
16 MHz
Operating Supply Voltage
5 V
Data Bus Width
8 Bit
Number Of Programmable I/os
74
Interface Type
HIF/I2C/SCI
On-chip Adc
8-chx10-bit
On-chip Dac
2-chx8-bit
Number Of Timers
3
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Company:
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Manufacturer:
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Quantity:
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HD64F3337YCP16V
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Automatic Alignment of SCI Bit Rate
When started in boot mode, the H8/3334YF measures the low period in asynchronous SCI data
transmitted from the host (figure 19.5). The data format is eight data bits, one stop bit, and no
parity bit. From the measured low period (9 bits), the H8/3334YF computes the host’s bit rate.
After aligning its own bit rate, the H8/3334YF sends the host 1 byte of H'00 data to indicate that
bit-rate alignment is completed. The host should check that this alignment-completed indication is
received normally and send one byte of H'55 back to the H8/3334YF. If the alignment-completed
indication is not received normally, the H8/3334YF should be reset, then restarted in boot mode to
measure the low period again. There may be some alignment error between the host’s and
H8/3334YF’s bit rates, depending on the host’s bit rate and the H8/3334YF’s system clock
frequency. To have the SCI operate normally, set the host’s bit rate to 2400, 4800, or 9600 bps
Table 19.8 lists typical host bit rates and indicates the clock-frequency ranges over which the
H8/3334YF can align its bit rate automatically. Boot mode should be used within these frequency
ranges
Table 19.8 System Clock Frequencies Permitting Automatic Bit-Rate Alignment by
Host Bit Rate
9600 bps
4800 bps
2400 bps
Notes: *1 Use a host bit rate setting of 2400, 4800, or 9600 bps only. No other setting should be
386
*2
.
*2 Although the H8/3334YF may also perform automatic bit-rate alignment with bit rate
Figure 19.5 Measurement of Low Period in Data Transmitted from Host
used.
and system clock combinations other than those shown in table 19.8, there will be a
slight difference between the bit rates of the host and the H8/3334YF, and subsequent
transfer will not be performed normally. Therefore, only a combination of bit rate and
system clock frequency within one of the ranges shown in table 19.8 can be used for
boot mode execution.
H8/3334YF
*1
Start
bit
D0
This low period (9 bits) is measured (H'00 data)
System Clock Frequencies Permitting Automatic Bit-Rate Alignment
by H8/3334YF
8 MHz to 16 MHz
4 MHz to 16 MHz
2 MHz to 16 MHz
D1
D2
D3
D4
D5
D6
D7
Stop
bit
High for at
least 1 bit
*1
.
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