Laptop User Manual

ELECTRICAL DATA S3C2440A RISC MICROPROCESSOR
27-40
Table 27-14 IIC BUS Controller Module Signal Timing
(V
DD
= 1.2 V ± 0.05 V, T
A
= -40 to 85 °C, V
EXT
= 3.3V ± 0.3V)
Parameter Symbol Min Typ. Max Unit
SCL Clock Frequency
f
SCL
– –
std. 100
fast 400
KHz
SCL High Level Pulse Width
t
SCLHIGH
std. 4.0
fast 0.6
– – µs
SCL Low Level Pulse Width
t
SCLLOW
std. 4.7
fast 1.3
– – µs
Bus Free Time Between STOP and START
t
BUF
std. 4.7
fast 1.3
– – µs
START Hold Time
t
STARTS
std. 4.0
fast 0.6
– – µs
SDA Hold Time
t
SDAH
std. 0
fast 0
–
std. –
fast 0.9
µs
SDA Setup Time
t
SDAS
std. 250
fast 100
– – ns
STOP Setup Time
t
STOPH
std. 4.0
fast 0.6
– – µs
NOTES: Std. means Standard Mode and fast means Fast Mode.
1. The IIC data hold time (tSDAH) is minimum 0ns.
(IIC data hold time is minimum 0ns for standard/fast bus mode in IIC specification v2.1)
Please check whether the data hold time of your IIC device is 0 nS or not.
2. The IIC controller supports only IIC bus device (standard/fast bus mode), and not C bus device.
Table 27-15 SD/MMC Interface Transmit/Receive Timing Constants
(V
DD
= 1.2 V ± 0.1 V, T
A
= -40 to 85 °C, V
EXT
= 3.3V ± 0.3V)
Parameter Symbol Min Typ. Max Unit
SD Command Output Delay Time
t
SDCD
0 – 1 ns
SD Command Input Setup Time
t
SDCS
5 – 14 ns
SD Command Input Hold Time
t
SDCH
0 – 1 ns
SD Data Output Delay Time
t
SDDD
0 – 1 ns
SD Data Input Setup Time
t
SDDS
5 – 13 ns
SD Data Input Hold Time
t
SDDH
0 – 1 ns