MSC8154 datasheet(51/68 Pages) FREESCALE

51 / 68 page

MSC8154 Quad-Core Digital Signal Processor Data Sheet, Rev. 2

Freescale Semiconductor

2.6.7

Asynchronous Signal Timing

Table 35 lists the asynchronous signal timing specifications.

The following interfaces use the specified asynchronous signals:

•

GPIO. Signals GPIO[31–0], when used as GPIO signals, that is, when the alternate multiplexed special functions are

not selected.

Note:

When used as a general purpose input (GPI), the input signal should be driven until it is acknowledged by the

MSC8154 device, that is, when the expected input value is read from the GPIO data register.

•

EE port. Signals EE0, EE1.

•

Boot function. Signal STOP_BS.

•

2C interface. Signals I2C_SCL and I2C_SDA.

•

Interrupt inputs. Signals IRQ[15–0] and NMI.

•

Interrupt outputs. Signals INT_OUT and NMI_OUT (minimum pulse width is 32 ns).

2.6.8

JTAG Signals

Table 38 lists the JTAG timing specifications shown in Figure 29 through Figure 32.

Figure 29 shows the test clock input timing diagram

Table 37. Signal Timing

Characteristics

Symbol

Type

Min

Input

tIN

Asynchronous

One CLKIN cycle

Output

tOUT

Asynchronous

Application dependent

Note:

Input value relevant for EE0, IRQ[15–0], and NMI only.

Table 38. JTAG Timing

Characteristics

Symbol

All frequencies

Unit

Min

Max

TCK cycle time

tTCKX

36.0

—

TCK clock high phase measured at VM = VDDIO/2

tTCKH

15.0

—

Boundary scan input data setup time

tBSVKH

0.0

—

Boundary scan input data hold time

tBSXKH

15.0

—

TCK fall to output data valid

tTCKHOV

—

20.0

TCK fall to output high impedance

tTCKHOZ

—

24.0

TMS, TDI data setup time

tTDIVKH

0.0

—

TMS, TDI data hold time

tTDIXKH

5.0

—

TCK fall to TDO data valid

tTDOHOV

—

10.0

TCK fall to TDO high impedance

tTDOHOZ

—

12.0

TRST assert time

tTRST

100.0

—

Note:

All timings apply to OnCE module data transfers as well as any other transfers via the JTAG port.

Figure 29. Test Clock Input Timing

TCK

(Input)

tTCKX

tTCKH

tTCKR

MSC8154 Datasheet(PDF) 51 Page - Freescale Semiconductor, Inc

MSC8154 Datasheet(HTML) 51 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68

Datasheet Download

Link URL