D12321VF20V Renesas Electronics America, D12321VF20V Datasheet - Page 652

• Manufacturer Part Number: D12321VF20V
• Description: IC H8S/2321 MCU ROMLESS 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of D12321VF20V

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 86
• Program Memory Type: ROMless
• Ram Size: 4K 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: 128-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 14 Serial Communication Interface (SCI)
The BRR setting is found from the following formulas.
Asynchronous mode:
Synchronous mode:
Where B: Bit rate (bits/s)
The bit rate error in asynchronous mode is found from the following formula:
Rev.6.00 Sep. 27, 2007 Page 620 of 1268
REJ09B0220-0600
N =
N =
Error (%) = {
N: BRR setting for baud rate generator (0 ≤ N ≤ 255)
φ: Operating frequency (MHz)
n: Baud rate generator input clock (n = 0 to 3)
n
0
1
2
3
(See the table below for the relation between n and the clock.)
64 × 2
8 × 2
Clock
φ
φ/4
φ/16
φ/64
2n–1
φ
2n–1
φ
(N + 1) × B × 64 × 2
× B
× B
× 10
× 10
CKS1
0
0
1
1
φ × 10
6
6
– 1
– 1
SMR Setting
6
CKS0
0
1
0
1
2n–1
– 1} × 100