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AMD
145Am79C930
3.3 V TAI INTERFACE AC CHARACTERISTICS
Parameter
Symbol Parameter Description Test Conditions Min Max Unit
tCLKIN CLKIN Period 50 ns
tCLIN CLKIN Low time 22 ns
tCHIN CLKIN High time 22 ns
tINHL CLKIN Fall time Note 8 3 ns
tINLH CLKIN Rise time Note 8 3 ns
tRXC RXC Period Note 5 1000 ns
tCLRX RXC Low time Note 5 480 ns
tCHRX RXC High time Note 5 480 ns
tRXHL RXC Fall time Note 8 20 ns
tRXLH RXC Rise time Note 8 20 ns
tTXC TXC Period Notes 1, 5, 7 1000 ns
tCLTX TXC Low time Notes 1, 5, 7 495 ns
tCHTX TXC High time Notes 1, 5, 7 495 ns
tTXHL TXC Fall time Notes 1, 8 5 ns
tTXLH TXC Rise time Notes 1, 8 5 ns
tTXCO TXC Period Notes 2, 7 1000 ns
tCLTXO TXC Low time Notes 2, 7 585 ns
tCHTXO TXC High time Notes 2, 7 385 ns
tTXHLO TXC Fall time Notes 2, 8 15 ns
tTXLHO TXC Rise time Notes 2, 8 15 ns
tRXDS RXD setup time to RXC ↑ Note 6 110 ns
tRXDH RXD hold time from RXC ↑ Note 6 10 ns
tTXDD TXD delay from TXC ↓ Notes 1, 3 10 200 ns
tTXDS TXD setup time to TXC ↑ Notes 2, 4 TCLTX-165 ns
tTXDH TXD hold time from TXC ↑ Notes 2, 4 TCHTX ns
tTXDV TXD delay from TXC ↓ Notes 2, 3 0 150 ns
Notes:
1. Only applicable when TXC has been configured as an INPUT.
2. Only applicable when TXC has been configured as an OUTPUT.
3. MIN value not tested.
4. Parameter calculated from other parameters.
5. Clock period must correlate to data rate as specified in DR bits of TCR30. Note that data rate is a function of DR and T
CLKIN
and
CLKGT20 bit of MIR9.
6. The values for these parameters are given for the case with CLKP = 0 (TCR2[4:0]). For nonzero values of CLKP, use the
following formulas:
If CLKGT20 = 0 (MIR9[7]), t
RXDS
min = 110–CLKP X T
CLKIN
t
RXDH
min = 10+CLKP X T
CLKIN
If CLKGT20 = 1 (MIR9[7]), t
RXDS
min = 110–CLKP X T
CLKIN
X
2
t
RXDH
min = 10+CLKP X T
CLKIN
X
2
7. Values given are for data rate of 1Mb/s. For other data rates,
t
TXC
is 1/DR, where DR = data rate in Hertz,
t
CLTX
is 60% of T
TXC
minus T
TXHL
,
t
CHTX
is 40% of T
TXC
minus T
TXHL
,
t
TXCO
is 1/DR, where DR = data rate in Hertz,
t
CLTXO
is 60% of T
TXCO
minus T
TXHLO
,
t
CHTXO
is 40% of T
TXCO
minus T
TXHLO
,
t
TXHLO
is 15 ns, regardless of DR value,
t
TXLHO
is 15 ns, regardless of DR value.
8. Parameter not included in the production test.