Samsung SC32442B54, Руководство пользователя

Страница: 552 / 647

SC32442B RISC MICROPROCESSOR ELECTRICAL DATA
25-
41
Table 25-12 IIC BUS Controller Module Signal Timing
(V
DDiarm
= 1.7V
±
0.05 V, V
DDi
= 1.2V
±
0.05 V, T
A
= -25 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
– –
µ
s
SCL Low Level Pulse Width
t
SCLLOW
std. 4.7
fast 1.3
– –
µ
s
Bus Free Time Between STOP and START
t
BUF
std. 4.7
fast 1.3
– –
µ
s
START Hold Time
t
STARTS
std. 4.0
fast 0.6
– –
µ
s
SDA Hold Time
t
SDAH
std. 0
fast 0
–
std. –
fast 0.9
µ
s
SDA Setup Time
t
SDAS
std. 250
fast 100
– – ns
STOP Setup Time
t
STOPH
std. 4.0
fast 0.6
– –
µ
s
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 25-13 SD/MMC Interface Transmit/Receive Timing Constants
(V
DDiarm
= 1.7V
±
0.05 V, V
DDi
= 1.2V
±
0.05 V, T
A
= -25 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
14 – – ns
SD Command Input Hold Time
t
SDCH
1 – – ns
SD Data Output Delay Time
t
SDDD
0 – 1 ns
SD Data Input Setup Time
t
SDDS
13 – – ns
SD Data Input Hold Time
t
SDDH
1 – – ns