K20P81M100SF2_1109 Datasheet, PDF (31/75 Pages) Freescale Semiconductor, Inc – K20 Sub-Family Data Sheet

Peripheral operating requirements and behaviors
Table 18. 32kHz oscillator DC electrical specifications (continued)
Symbol
C_para
C_load
V_pp1
Description
Parasitical capacitance of EXTAL32 and XTAL32
Internal load capacitance (programmable)
Peak-to-peak amplitude of oscillation
Min.
—
—
—
Typ.
5
15
0.6
Max.
Unit
7
pF
—
pF
—
V
1. The EXTAL32 and XTAL32 pins should only be connected to required oscillator components and must not be connected to
any other devices.
6.3.3.2 32kHz oscillator frequency specifications
Table 19. 32kHz oscillator frequency specifications
Symbol
f_{osc_lo}
t_start
Description
Oscillator crystal
Crystal start-up time
Min.
Typ.
Max.
Unit
—
32.768
—
kHz
—
1000
—
ms
1. Proper PC board layout procedures must be followed to achieve specifications.
Notes
1
6.4 Memories and memory interfaces
6.4.1 Flash (FTFL) electrical specifications
This section describes the electrical characteristics of the FTFL module.
6.4.1.1 Flash timing specifications — program and erase
The following specifications represent the amount of time the internal charge pumps are
active and do not include command overhead.
Table 20. NVM program/erase timing specifications
Symbol Description
t_hvpgm4 Longword Program high-voltage time
t_hversscr Sector Erase high-voltage time
t_hversblk256k Erase Block high-voltage time for 256 KB
Min.
—
—
—
Typ.
7.5
13
416
Max.
18
113
3616
Unit
Notes
μs
ms
1
ms
1
1. Maximum time based on expectations at cycling end-of-life.
K20 Sub-Family Data Sheet Data Sheet, Rev. 6, 9/2011.
Freescale Semiconductor, Inc.
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