m35046 Renesas Electronics Corporation., m35046 Datasheet - Page 15

• Manufacturer Part Number: m35046
• Description: Screen Character And Pattern Display Controllers
• Manufacturer: Renesas Electronics Corporation.

REGISTER SUPPLEMENTARY DESCRIPTION
(1) Setting external clock input mode (by use of EXCK0 (120
(a) When (EXCK1, EXCK0) = (0, 0), F
(b) When (EXCK1, EXCK0) = (1, 1), F
14
H o r i z o n t a l s y n c h r o n o u s s i g n a l
EXCK1 (123
Two modes given below are available for the external clock sig-
nal input. (the settings (EXCK1, EXCK0) = (0, 1), (1, 0) are forbid-
den.)
Input from the TCK pin a constant-period continuous external
clock that synchronizes with the horizontal synchronization signal.
And input from HOR pin a constant-period continuous horizontal
synchronous signal.
Never stop inputting the clock while displaying.
Do not have to set a display frequency because the clock just as
it is entered from outside is used as the display clock.
Input from the TCK pin a constant-period continuous external
clock that synchronizes with the horizontal synchronization signal.
Never stop inputting the clock while displaying.
Be sure to set a display frequency because the internal clock
made to synchronize with the clock input from outside is used as
the display clock (see the next page).
( E x a m p l e f o r i n p u t )
16
))
E x t e r n a l c l o c k
OSC
OSC
= 20 to 30 MHz
= 20 to 80 MHz
16
) and
SCREEN CHARACTER and PATTERN DISPLAY CONTROLLERS
MITSUBISHI MICROCOMPUTERS
M35046-XXXSP/FP