PXN20 Datasheet, PDF (40/60 Pages) Freescale Semiconductor, Inc – PXN20 Microcontroller

Electrical characteristics
Table 21. Flash program and erase specifications¹ (continued)
Spec
Characteristic
Symbol
Min
Initial
Max²
Max³
Unit
6 256 KB Block Pre-program and Erase Time
t_256kpperase — 5200 15,000 ms
7 Wait States Relative to System Frequency⁵
PFCRPn[RWSC] = PFCRPn[APC] = 0b000; PFCRPn[WWSC] = 0b01
t_rwsc
——
MHz
30
PFCRPn[RWSC] = PFCRPn[APC] = 0b001; PFCRPn[WWSC] = 0b01
——
60
PFCRPn[RWSC] = PFCRPn[APC] = 0b010; PFCRPn[WWSC] = 0b01
——
90
PFCRPn[RWSC] = PFCRPn[APC] = 0b011 – 0b111; PFCRPn[WWSC] = 0b01
— — f_SYS max
8 Recovery Time
t_Recover — —
45 s
1 _{Typical program and erase times assume nominal supply values and operation at 25} o_C.
2 _{Initial factory condition:  100program/erase cycles, nominal supply values and operation at 25} o_C.
3 _{The maximum time is at worst case conditions after the specified number of program/erase cycles. This maximum value is}
characterized but not guaranteed.
4 _{Actual hardware programming time. This does not include software overhead.}
5 _{Wait state timing is based on the system clock frequency and thus is same for all masters.}
Table 22. Flash EEPROM Module Life (Full Temperature Range)
Spec
Characteristic
Symbol
Min Typical¹ Unit
1 Number of Program/Erase cycles per block for 16 KB and 64 KB blocks
over the operating temperature range (T_J)
P/E
100,000 — cycles
2 Number of Program/Erase cycles per block for 128 KB blocks over the
operating temperature range (T_J)
3 Minimum Data Retention at 85 °C ambient temperature²
Blocks with 0–1,000 P/E cycles
Blocks with 1,001–10,000 P/E cycles
Blocks with 10,001–100,000 P/E cycles
P/E
1,000 100,000 cycles
Retention
20
10
1–5
— years
1 _{Typical endurance is evaluated at 25} o_{C. Product qualification is performed to the minimum specification. For additional}
information on the Freescale definition of Typical Endurance, please refer to Engineering Bulletin EB619, Typical Endurance
for Nonvolatile Memory.
2 _{Ambient temperature averaged over duration of application, not to exceed product operating temperature range.}
4.13
Spec
1
Pad AC specifications
Table 23. Pad AC specifications (5.0 V, 2.5 V)¹
Pad Type²
SRC/DSC³ Output Delay^4,4 (ns)
Rise/Fall^5,6
(ns)
Slow⁷
318/343
00
408/431
61/67
01
80/90
18/18
11
27/28
155/173
188/204
30/34
38/44
10/11
15/17
Load Drive
(pF)
50
200
50
200
50
200
PXN20 Microcontroller Data Sheet, Rev. 1
40
Freescale Semiconductor