K20P144M120SF3_1210 Datasheet, PDF (34/86 Pages) Freescale Semiconductor, Inc – K20 Sub-Family

Peripheral operating requirements and behaviors
6.3.3.2 32kHz oscillator frequency specifications
Table 19. 32kHz oscillator frequency specifications
Symbol Description
f_{osc_lo}
t_start
v_{ec_extal32}
Oscillator crystal
Crystal start-up time
Externally provided input clock amplitude
Min.
Typ.
Max.
Unit
—
32.768
—
kHz
—
1000
—
ms
700
—
V_BAT
mV
Notes
1
2, 3
1. Proper PC board layout procedures must be followed to achieve specifications.
2. This specification is for an externally supplied clock driven to EXTAL32 and does not apply to any other clock input. The
oscillator remains enabled and XTAL32 must be left unconnected.
3. The parameter specified is a peak-to-peak value and V_IH and V_IL specifications do not apply. The voltage of the applied
clock must be within the range of V_SS to V_BAT.
6.4 Memories and memory interfaces
6.4.1 Flash (FTFE) electrical specifications
This section describes the electrical characteristics of the FTFE 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_hvpgm8 Program Phrase high-voltage time
t_hversscr Erase Flash Sector high-voltage time
t_hversblk128k Erase Flash Block high-voltage time for 128 KB
t_hversblk256k Erase Flash Block high-voltage time for 256 KB
Min.
—
—
—
—
Typ.
7.5
13
104
208
Max.
18
113
1808
3616
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 21. Flash command timing specifications
Symbol
t_rd1blk128k
t_rd1blk256k
Description
Read 1s Block execution time
• 128 KB data flash
• 256 KB program flash
Min.
—
—
Typ.
—
—
Max.
0.5
1.0
Unit
Notes
ms
ms
Table continues on the next page...
K20 Sub-Family Data Sheet, Rev. 4, 10/2012.
34
Freescale Semiconductor, Inc.