Hd44797E - Hitachi AP1 Data Book

HD44797E---------------
The HD44797E is an evaluation chip for 4-bit single-chip
microcomputer LCD-III/IV. The HD44797E has the same logical
functions as LCD-III/IV except that its ROM is external. All I/O
pins are open drain.
The HD44797E provides( 12-bit address outputs
(Ao
to
All
terminals) and 5-bit instruction input pins (0
1
/0
6
to 0
6
/010 pins)
for the external program memory. ", and TSTP pins are required
for debugging programs, and SELECT pin for selecting applicable
chips.
• APPLICABLE CHIPS
LCD-III. LCD-IV
• FUNCTION
• Instruction Characteristics etc.; Same as LCD-III. LCD-IV
• Address External ROM (4k)
• I/O Pins (D. R. INT
()o
INT 1); Open Drain
• PIN NAME
V l' V 2 • V3
OSC
1
m
: Power Supply for LCD
: External Clock Input Pin
: Halt Pin
Roo to R03 : Input Port
RIO to R 23 : I/O Port
R30 to R33 : Output Port
Do to 0 13 : I/O Port
D 1 .. /XO.D 1 JXI : I/O Port or Clock Input Pin for Timer
INT
()o
INT 1 : Interrupt
COM 1 to COM .. : Common Signal Pin
SEG 1 to SEG 32 : Segment Signal Pin
Ao to All : Program Memory Access Pin
0l/Oe
to
0J010:
Instruction Input Pin
",. 4> 1. "'2 : Clock Signal
TSTP : TimerlPrescaler Stop Signal Pin
SELECT : Applicable Chips Selecting Pin
HD44797E
(FP-100)
• PIN ARRANGEMENT
l-
N _
o~
;:::;;;
g ::: :: ;;
~
!!
~
:
~~..: ~o
CCC0.~~~~~~~~~~~~I-~~
1111111111;
HD44797E
1::1T:1T:IT:lf::IT:IT;;
n:n
:0:0;11:11"1 :11 :11:11;11'11:11
=
. . . . . . 2'
O-N~
. . . . . . . .
2:~~~~~~ii
« « « « « « 0 0 0 0 0 0 0 0
(Note) • : Additional pin for evaluation chip.
(Top View)
294
~ GND
~ SEG ••
e
SEG.,
~ SEG. o
~ SEG ••
;!
SEG ..
Po
SEG'
7
~ SEG ••
Po
SEG ..
~ SEG ••
~ SEG ••
~ SEG ••
~ SEG.,
~ SEG. o
~ SEG,.
~ SEG
lO
~ SEG
17
~ SEG ..
~ SEG ..
~ SEG,.
g
SEG,.
~ SEG,.
~ SEG
l1
:: SEG,o
~ SEG.
~ SEG.
~.
SEG
7
~.
SEG.
~"
SEG.
" SEG.