ATJ2073 ETC, ATJ2073 Datasheet - Page 39

• Manufacturer Part Number: ATJ2073
• Description: The Atj2073 is a Single-chip Highly-intergrated Digital Music System Solution for Devices such as Dedicated Audio Players, Pdas, and cell Phones
• Manufacturer: ETC

(6) Keyboard interface parameter
Parameter
KEYOUT (7:0) low-level width
Voltage stabilization time
(KEYOUT n
Key scan interval time
Key input delay time (from KEYOUT
n )
Key input hold time (from KEYOUT
n )
Remarks
1. KEYOUT(7:0) is multiplexed with GIOF(7:0); KEYIN(3:0) is multiplexed with GIOD(7:4); KEYIN(11:4) is
multiplexed with GIOE(7:0)
2. Keyscan Debouncing time is set thru Bit(2:0) of the MFP Configuration1 Register[0xB1h]
3. n = 0 to 7
(a) Keyboard scan parameter 1
(b) Keyboard scan parameter 2
(c) Keyboard port parameter
Page 39 of 45
KEYOUT
Remark n=0 to 6
KEYOUT
(output)
KEYOUT
(output)
KEYOUT
(output)
KEYOUT
(output)
(output)
(n+1)
0
1
7
n
ATJ2073
KEYOUT (n+1) )
Symbol
tSCAN
tKWAIT Debounce time=2.5ms
tKI
tKS
tKH
t
SCAN
Debounce time=2.5ms
Debounce time=2.5ms
Condition
Debounce time=2.5ms
Debounce time=2.5ms
ss
ss
ss
t
KWAIT
t
KWAIT
Actions Semiconductor Co.,LTD
t
MIN. MAX. Unit
130
0
130
0
0
KI
us
us
us
us
us
Data Sheet