AK4184A Datasheet, PDF (8/36 Pages) Asahi Kasei Microsystems – TSC with Keypad Scanner and GPIO Expander

[AK4184A]
εΠονϯάಛੑ
(Ta = -40°C to 85°C, AVDD = 2.5V to 3.6V, IOVDD = 1.6V to AVDD, C_L = 20pF)
Parameter
Symbol
min
typ
Internal oscillator frequency
fosc
0.9
1.3
Touch Panel (A/D Converter)
SCLK period
Sampling Time (Rin = 600Ω)
Throughput Rate
tCP
tSam
fs
200
-
1.5
-
-
-
Conversion Time
tCONV
24
-
Timing Characteristics
SCLK Pulse Width Low
Pulse Width High
CSN “↓” to First SCLK “↓”
CSN “↓” to DOUT Tri-State Disabled
Data Setup Time
tCKL
tCKH
tCSS
tDV
tDS
80
-
80
-
300
-
-
-
40
-
Data Hold Time
tDH
40
-
Data Output Delay after SCLK “↓”
CSN “↑” to DOUT Hi-Z state
CSN lH” Time
tDD
tCDZ
tCSW
-
-
-
-
150
-
SCLK “↑” to CSN “↑”
tCSH
50
-
Reset Timing
RESETN Pulse Width (Note 5)
tRST
20
-
Note 5. RESETN pin = “L” ʹ͢Δ͜ͱͰϦηοτ͕͔͔Γ·͢ɻ
CSN
SCLK
tCSS
DIN
tDV
DOUT
Hi-Z
RESETN
tCP
tDD
tCKH
tCKL
tDS
tDH
D11
D10
Figure 2. Timing Diagram
tRST
Figure 3. Power-down & Reset Timing
max
1.7
1000
125
-
-
-
-
50
-
-
50
70
-
-
-
Units
MHz
ns
µs
KHz
tCP
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
µs
tCSW
VIH
VIL
tCSH
VIH
VIL
tCDZ
Hi-Z
D0
VIH
VIL
50%IOVDD
VIL
MS0947-J-00
-8-
2008/04