D12312SVF20V Renesas Electronics America, D12312SVF20V Datasheet - Page 790

• Manufacturer Part Number: D12312SVF20V
• Description: IC H8S/2312S MCU ROMLESS 100QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12312SVF20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• For Use With: EDK2329 - DEV EVALUATION KIT H8S/2329
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 17 ROM
Communications Protocol
After adjustment of the bit rate, the protocol for communications between the host and the boot
program is as shown below.
(1) One-byte commands and one-byte responses
(2) n-byte commands or n-byte responses
(3) Error response
(4) Programming of n bytes
(5) Memory read response
Rev.7.00 Feb. 14, 2007 page 756 of 1108
REJ09B0089-0700
These commands and responses are comprised of a single byte. These are consists of the
inquiries and the ACK for successful completion.
These commands and responses are comprised of n bytes of data. These are selections and
responses to inquiries.
The amount of programming data is not included under this heading because it is determined
in another command.
The error response is a response to inquiries. It consists of an error response and an error code
and comes two bytes.
The size is not specified in commands. The size of n is indicated in response to the
programming unit inquiry.
This response consists of four bytes of data.
Host
Figure 17.83 Bit-Rate-Adjustment Sequence
H'00 (Completion of Adjustment)
H'E6 (Response to Boot)
H'00 (30 times maximum)
H'FF (Error)
H'55
Boot Program
Measuring the
1-Bit Length