K51P81M72SF1 Datasheet, PDF (32/77 Pages) Freescale Semiconductor, Inc – K51 Sub-Family

Peripheral operating requirements and behaviors
6.3.3.2 32kHz oscillator frequency specifications
Table 17. 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 electrical specifications
This section describes the electrical characteristics of the flash memory 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 18. NVM program/erase timing specifications
Symbol Description
t_hvpgm4 Longword Program high-voltage time
t_hversscr Sector Erase high-voltage time
t_hversblk32k Erase Block high-voltage time for 32 KB
t_hversblk256k Erase Block high-voltage time for 256 KB
Min.
—
—
—
—
Typ.
7.5
13
52
104
Max.
18
113
452
904
Unit
Notes
μs
ms
1
ms
1
ms
1
1. Maximum time based on expectations at cycling end-of-life.
6.4.1.2 Flash timing specifications — commands
Table 19. Flash command timing specifications
Symbol
t_rd1blk32k
t_rd1blk256k
Description
Read 1s Block execution time
• 32 KB data flash
• 256 KB program flash
Min.
—
—
Typ.
—
—
Max.
0.5
1.7
Unit
Notes
ms
ms
t_rd1sec1k Read 1s Section execution time (data flash
sector)
—
—
60
μs
1
t_rd1sec2k Read 1s Section execution time (program flash
—
—
60
μs
1
sector)
Table continues on the next page...
K51 Sub-Family Data Sheet, Rev. 2, 4/2012.
32
Freescale Semiconductor, Inc.