Renesas R61509V 用户手册

Rev. 0.11 April 25, 2008, page 12 of 181  

 

IM2  IM1  IM0  System interface 

DB pins 

RAM write data 

Instruction write 

transfer 

0 0 0 

80-system 18-bit 
interface 

DB17-0 

Single transfer (18 bits) 

Single transfer 
(16 bits) 

0 0 1 

80-system 9-bit 
interface 

DB17-9 2-transfer 

(1

st

: 9 bits, 2

nd

: 9 bits) 

2-transfer  
(1

st

: 8 bits, 2

nd

: 8 

bits) 

0 1 0 

80-system 16-bit 
interface 

DB17-10, 
DB8-1 

Single transfer (16 bits) 
2-transfer (1

st

: 2 bits, 2

nd

: 16 bits) 

2-transfer (1

st

: 16 bits, 2

nd

: 2 bits) 

Single transfer  
(16 bits) 

0 1 1 

80-system 8-bit 
interface 

DB17-10

2-transfer (1

st

: 8 bits, 2

nd

: 8 bits) 

3-transfer (1

st

: 6 bits, 2

nd

: 6 bits, 3

rd

: 6 

bits) 

2-transfer  
(1

st

: 8 bits, 2

nd

: 8 

bits) 

1 0 * 

Clock 
synchronous 
serial interface 

- 

(SDI, 
SDO) 

2-transfer (1

st

: 8 bits, 2

nd

: 8 bits) 

2-transfer  
(1

st

: 8 bits, 2

nd

: 8 

bits) 

1 1 0 Setting 

disabled 

- 

- 

- 

1 1 1 Setting 

disabled 

 

- 

- 

- 

 

The R61509V supports RGB and VSYNC interfaces as the external interface to display moving picture.  

When the RGB interface is selected, the display operation is synchronized with externally supplied 
synchronous signals (VSYNCX, HSYNCX, and DOTCLK). In RGB interface operation, data (DB17-0) is 
written in synchronization with these signals when the polarity of enable signal (ENABLE) allows write 
operation in order to prevent flicker when updating display data. 

In VSYNC interface operation, the display operation is synchronized with the internal clock except frame 
synchronization, which synchronizes the display operation with the VSYNCX signal.  The display data is 
written to the internal GRAM via system interface.  When writing data via VSYNC interface, there are 
constraints in speed and method in writing data to the internal RAM.  For details, see Section “VSYNC 
Interface”.  

The R61509V allows switching interface by instruction according to the display image (still and/or moving 
picture). This allows data to be transferred only when the data is updated hence less power consumption 
during moving picture display.  

The address counter (AC) gives an address to the internal GRAM.  When the index of a register is written 
to the IR, the address information is sent from the IR to the AC.  After data is written to GRAM, the 
address in the AC is automatically updated plus or minus 1.  The window address function enables writing 
data only within the rectangular area specified in the GRAM.