Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Dot Character VFD Controller/Driver IC
PT6314
8-BIT M68 TYPE PARALLEL DATA TRANSFER
RS
R/W
E
IR7
IR6
IR7
IR6
BF="0"
IR6
D7
D6
DB7
DB6
DB0
IR0
IR0
IR0
D0
Write
Instruction
Write
Instruction
Read
Instruction
Write
Data
I80 TYPE PARALLEL DATA TRANSFER
The i80 type of parallel data transfer mode is selected when IFSEL is set to “1”and MCU is set to “0”. A
type of pipeline process is performed between LSIs via the bus holder attached to the internal data bus
whenever data is sent from the MCU. It is important to take note that certain restrictions exists in the
read sequence of this display data RAM. The data of the specified address is not generated by the read
instructions issued immediately after the address setup. This data is generated in the when the data is
read the second time. Thus, a dummy read is required whenever the address setup or write cycle
operation is selected. Please refer to the diagrams below.
PT6314 V1.3
- 20 -
March, 2006
PTC [ PRINCETON TECHNOLOGY CORP ]
