D12674RVFQ33D Renesas Electronics America, D12674RVFQ33D Datasheet - Page 301

• Manufacturer Part Number: D12674RVFQ33D
• Description: MCU 3V 0K I-TEMP 144-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of D12674RVFQ33D

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 33MHz
• Connectivity: IrDA, SCI
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 103
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 12x10b; D/A 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Other names: HD6412674RVFQ33D; HD6412674RVFQ33D

6.9.2
Table 6.12 shows the pin states in an idle cycle.
Table 6.12 Pin States in Idle Cycle
Notes: 1. Remains low in DRAM space RAS down mode.
6.10
This LSI has a write data buffer function for the external data bus. Using the write data buffer
function enables external writes and DMA single address mode transfers to be executed in parallel
with internal accesses. The write data buffer function is made available by setting the WDBE bit
to 1 in BCR.
Figure 6.83 shows an example of the timing when the write data buffer function is used. When this
function is used, if an external write or DMA single address mode transfer continues for two states
or longer, and there is an internal access next, an external write only is executed in the first state,
but from the next state onward an internal access (on-chip memory or internal I/O register
read/write) is executed in parallel with the external write rather than waiting until it ends.
Pins
A23 to A0
D15 to D0
CSn (n = 7 to 0)
UCAS, LCAS
AS
RD
(OE)
HWR, LWR
DACKn (n = 1, 0)
EDACKn (n = 3 to 0)
2. Remains low in a DRAM space refresh cycle.
Pin States in Idle Cycle
Write Data Buffer Function
Pin State
Contents of following bus cycle
High impedance
High *
High *
High
High
High
High
High
High
1
2
*
2
Rev. 3.00 Mar 17, 2006 page 249 of 926
Section 6 Bus Controller (BSC)
REJ09B0283-0300