LC78711E Datasheet, PDF (6/43 Pages) Sanyo Semicon Device – Graphics Display Processor

LC78711E
Continued from preceding page.
Pin no.
51
52
53
Pin
TEST12
PALID
HRESET
Pin type
Test input
PAL mode external control input
External horizontal
synchronization input
54
FSCO
Clock output
External vertical
55
VRESET
synchronization input
56
INIT
Initialization input
57
RESET
Reset input
58
N/P1
NTSC/PAL selection
59
N/P2
NTSC/PAL selection
60
SON
Superimpose control
61
XIN2
Crystal oscillator element
62
XOUT2
connections
63
XIN1
Crystal oscillator element
64
XOUT1
connections
I/O Polarity
Pin function
I
Positive Test input. Must be connected to ground during normal operation.
External superimpose function control input for PAL mode
I
Positive _{(A pull-up resistor is built in.)}
I
Negative External horizontal synchronization timing control input
Subcarrier clock output
O
Positive NTSC mode: 3.579545 MHz
PAL mode: 4.433619 MHz
I
Negative External vertical synchronization timing control input
I
Negative System initialization signal input
I
Negative System reset signal input
NTSC/PAL selection input (RGB encoder block)
I
Positive _{High: NTSC, low: PAL}
NTSC/PAL selection input (decoder block)
I
Positive _{High: NTSC, low: PAL}
Superimpose function on/off control input
I
Positive _{High: superimpose on}
I
—
Connections for the PAL crystal oscillator element
O
—
(4·fsc = 17.734476 MHz)
I
—
Connections for the NTSC crystal oscillator element
O
—
(4·fsc = 14.31818 MHz)
Timing Characteristics (DRAM access timing) at Ta = +25°C, DV_DD1 = 5 V
Parameter
Random read/write cycle
Page mode cycle
RAS access time
CAS access time
Output turn off delay
RAS precharge time
RAS pulse width
RAS pulse width (page mode)
RAS hold time
CAS hold time
CAS pulse width
CAS precharge time
CAS precharge time
Row address setup time
Row address hold time
Column address setup time
Column address hold time
Read command setup time
Read command hold time
Read command hold time
Write command setup time
Write command hold time
Write command pulse width
Write data setup time
Write data setup time
CAS setup time
CAS hold time
RAS precharge CAS active time
Refresh time
Symbol
Conditions
t_RC
t_PC
t_RAC
t_CAC
t_OFF
t_RP
t_RAS
t_RASP
t_RSH
t_CSH
t_CAS
t_CPN
t_CP
t_ASR
t_RAH
t_ASC
t_CAH
t_RCS
t_RCH
t_RRH
t_WCS
t_WCH
t_WP
t_DS
t_DH
t_CSR
t_CHR
t_RPC
t_REF
Page mode
Referenced to CAS
Referenced to RAS
CAS before RAS
CAS before RAS
min
250
130
100
120
60
120
60
50
50
100
50
0
50
150
120
120
100
50
150
100
100
50
50
50
Ratings
typ
Unit
max
ns
ns
210
ns
10
ns
20
ns
ns
ns
18000
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
3.5 ms
No. 5476-6/43