PXN20 Datasheet, PDF (41/60 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Electrical characteristics
Table 23. Pad AC specifications (5.0 V, 2.5 V)¹ (continued)
Spec
Pad Type²
SRC/DSC³ Output Delay^4,4 (ns)
Rise/Fall^5,6
(ns)
Load Drive
(pF)
142/186
65/89
50
00
195/253
91/122
200
2
Medium
20/35
8.7/16.6
50
01
41/64
24/35
200
12/11
5.3/5.9
50
11
32/34
21/23
200
00
10
3
Fast⁸
01
2.7
1.5
20
10
30
11
50
4
Input
N/A
1.9/1.9
1.5/1.5
0.5
1 _{These are worst case values that are estimated from simulation and not tested. The values in the table are simulated at}
F_SYS = 116 MHz, V_DD = 1.08 – 1.32 V, V_DDE = 1.62 – 1.98 V, V_DDEH = 4.5 – 5.5 V, V_RC33 and V_DDPLL = 3.0 – 3.6 V, T_A = T_L to
T_H.
2 _{Slow = SH or SHA; Medium = MH or MHA; Fast = F; Input = IHA. See Table 3.}
3 _{SRC/DSC are bit fields in the Pad Configuration Registers. SRC—Slew Rate Control (slow and medium pad types only),}
DSC—Drive Strength Control (fast pad type only).
4 _{This parameter is supplied for reference and is not guaranteed by design and not tested.}
5 _{This parameter is guaranteed by characterization before qualification rather than 100% tested.}
6 _{Delay and rise/fall are measured to 20% or 80% of the respective signal.}
7 _{Add a maximum of one system clock to the output delay for delay with respect to system clock.}
8 _{Output delay is shown in. Add a maximum of one system clock to the output delay for delay with respect to system clock.}
Table 24. De-rated pad AC specifications (3.3 V, 3.3 V)¹
Spec
Pad Type²
SRC/DSC³
Out Delay^4,5
(ns)
Rise/Fall^6,
(ns)
Load Drive
(pF)
1
Slow⁷
2
Medium
408/431
188/204
50
00
533/592
250/288
200
80/90
38/44
50
01
146/167
82/96
200
27/28
15/17
50
11
81/92
57/67
200
184/240
79/107
50
00
253/330
114/153
200
28/47
11.8/21.8
50
01
58/88
34/49
200
18/17
7.6/8.9
50
11
46/51
30/35
200
PXN20 Microcontroller Data Sheet, Rev. 1
Freescale Semiconductor
41