DF61657CN35FTV Renesas Electronics America, DF61657CN35FTV Datasheet - Page 753
DF61657CN35FTV
Manufacturer Part Number
DF61657CN35FTV
Description
IC H8SX/1657 MCU FLASH 120TQFP
Manufacturer
Renesas Electronics America
Series
H8® H8SX/1600r
Datasheet
1.DF61656N35FTV.pdf
(894 pages)
Specifications of DF61657CN35FTV
Core Processor
H8SX
Core Size
32-Bit
Speed
35MHz
Connectivity
SCI, SmartCard
Peripherals
DMA, PWM, WDT
Number Of I /o
82
Program Memory Size
768KB (768K x 8)
Program Memory Type
FLASH
Ram Size
24K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
120-TQFP, 120-VQFP
For Use With
3DK1657 - DEV EVAL KIT FOR H8SX/1657
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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4. Bit rate
When the new bit rate is selectable, the rate will be set in the register after sending ACK in
response. The host will send an ACK with the new bit rate for confirmation and the boot program
will response with that rate.
Confirmation
• Confirmation, H'06, (one byte): Confirmation of a new bit rate
Response
• Response, H'06, (one byte): Response to confirmation of a new bit rate
The sequence of new bit-rate selection is shown in figure 18.26.
To facilitate error checking, the value (n) of clock select (CKS) in the serial mode register
(SMR), and the value (N) in the bit rate register (BRR), which are found from the peripheral
operating clock frequency (φ) and bit rate (B), are used to calculate the error rate to ensure that
it is less than 4%. If the error is more than 4%, a bit rate error is generated. The error is
calculated using the following expression:
Error (%) = {[
Setting a new bit rate
Waiting for one-bit period
at the specified bit rate
H'06
H'06
Host
(N + 1) × B × 64 × 2
Figure 18.26 New Bit-Rate Selection Sequence
φ × 10
H'06 (ACK) with the new bit rate
H'06 (ACK) with the new bit rate
6
Setting a new bit rate
(2×n − 1)
H'06 (ACK)
] − 1} × 100
Section 18 Flash Memory (0.18-µm F-ZTAT Version)
Rev. 2.00 Jun. 28, 2007 Page 727 of 864
Setting a new bit rate
Boot program
REJ09B0341-0200
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