Texas Instruments AM1808 - Page 220

AM1808
SPRS653E –FEBRUARY 2010–REVISED MARCH 2014 www.ti.com
6.26.2 uPP Electrical Data/Timing
Table 6-116. Timing Requirements for uPP (see Figure 6-69, Figure 6-70, Figure 6-71, Figure 6-72)
1.3V, 1.2V 1.1V 1.0V
NO. UNIT
MIN MAX MIN MAX MIN MAX
SDR mode 13.33 20 26.66
1 t
c(INCLK)
Cycle time, CHn_CLK ns
DDR mode 26.66 40 53.33
SDR mode 5 8 10
2 t
w(INCLKH)
Pulse width, CHn_CLK high ns
DDR mode 10 16 20
SDR mode 5 8 10
3 t
w(INCLKL)
Pulse width, CHn_CLK low ns
DDR mode 10 16 20
4 t
su(STV-INCLKH)
Setup time, CHn_START valid before CHn_CLK high 4 5.5 6.5 ns
5 t
h(INCLKH-STV)
Hold time, CHn_START valid after CHn_CLK high 0.8 0.8 0.8 ns
6 t
su(ENV-INCLKH)
Setup time, CHn_ENABLE valid before CHn_CLK high 4 5.5 6.5 ns
7 t
h(INCLKH-ENV)
Hold time, CHn_ENABLE valid after CHn_CLK high 0.8 0.8 0.8 ns
Setup time, CHn_DATA/XDATA valid before CHn_CLK
8 t
su(DV-INCLKH)
4 5.5 6.5 ns
high
9 t
h(INCLKH-DV)
Hold time, CHn_DATA/XDATA valid after CHn_CLK high 0.8 0.8 0.8 ns
Setup time, CHn_DATA/XDATA valid before CHn_CLK
10 t
su(DV-INCLKL)
4 5.5 6.5 ns
low
11 t
h(INCLKL-DV)
Hold time, CHn_DATA/XDATA valid after CHn_CLK low 0.8 0.8 0.8 ns
19 t
su(WTV-INCLKL)
Setup time, CHn_WAIT valid before CHn_CLK high 10 12 14 ns
20 t
h(INCLKL-WTV)
Hold time, CHn_WAIT valid after CHn_CLK high 0.8 0.8 0.8 ns
21 t
c(2xTXCLK)
Cycle time, 2xTXCLK input clock
(1)
6.66 10 13.33 ns
(1) 2xTXCLK is an alternate transmit clock source that must be at least 2 times the required uPP transmit clock rate (as it is is divided down
by 2 inside the uPP). 2xTXCLK has no specified skew relationship to the CHn_CLOCK and therefore is not shown in the timing diagram.
Table 6-117. Switching Characteristics Over Recommended Operating Conditions for uPP
1.3V, 1.2V 1.1V 1.0V
NO. PARAMETER UNIT
MIN MAX MIN MAX MIN MAX
SDR mode 13.33 20 26.66
12 t
c(OUTCLK)
Cycle time, CHn_CLK ns
DDR mode 26.66 40 53.33
SDR mode 5 8 10
13 t
w(OUTCLKH)
Pulse width, CHn_CLK high ns
DDR mode 10 16 20
SDR mode 5 8 10
14 t
w(OUTCLKL)
Pulse width, CHn_CLK low ns
DDR mode 10 16 20
15 t
d(OUTCLKH-STV)
Delay time, CHn_START valid after CHn_CLK high 2 11 2 15 2 21 ns
16 t
d(OUTCLKH-ENV)
Delay time, CHn_ENABLE valid after CHn_CLK high 2 11 2 15 2 21 ns
17 t
d(OUTCLKH-DV)
Delay time, CHn_DATA/XDATA valid after CHn_CLK high 2 11 2 15 2 21 ns
18 t
d(OUTCLKL-DV)
Delay time, CHn_DATA/XDATA valid after CHn_CLK low 2 11 2 15 2 21 ns
220 Peripheral Information and Electrical Specifications Copyright © 2010–2014, Texas Instruments Incorporated
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