mc9s12xs128 Freescale Semiconductor, Inc, mc9s12xs128 Datasheet - Page 566

• Manufacturer Part Number: mc9s12xs128
• Description: Hcs12 Microcontrollers 16-bit Automotive Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

128 KByte Flash Module (S12XFTMR128K1V1)
19.3.2.1
The FCLKDIV register is used to control timed events in program and erase algorithms.
All bits in the FCLKDIV register are readable, bits 6–0 are write once and bit 7 is not writable.
566
FDIV[6:0]
FDIVLD
Address
Offset Module Base + 0x0000
Reset
& Name
0x0010
0x0011
0x0012
0x0013
FRSV2
FRSV3
FRSV4
Field
FOPT
6–0
7
W
R
FDIVLD
Clock Divider Loaded
0 FCLKDIV register has not been written
1 FCLKDIV register has been written since the last reset
Clock Divider Bits — FDIV[6:0] must be set to effectively divide OSCCLK down to generate an internal Flash
clock, FCLK, with a target frequency of 1 MHz for use by the Flash module to control timed events during program
and erase algorithms.
Please refer to
Flash Clock Divider Register (FCLKDIV)
0
7
W
W
W
W
R
R
R
R
NV7
= Unimplemented or Reserved
7
0
0
0
Figure 19-4. FTMR128K1 Register Summary (continued)
Section 19.4.1, “Flash Command Operations,”
0
6
Figure 19-5. Flash Clock Divider Register (FCLKDIV)
= Unimplemented or Reserved
NV6
Table 19-7
6
0
0
0
Table 19-6. FCLKDIV Field Descriptions
S12XS Family Reference Manual, Rev. 1.10
0
5
shows recommended values for FDIV[6:0] based on OSCCLK frequency.
NV5
5
0
0
0
0
4
NV4
Description
4
0
0
0
FDIV[6:0]
0
3
for more information.
NV3
3
0
0
0
0
2
NV2
2
0
0
0
Freescale Semiconductor
NV1
0
1
1
0
0
0
NV0
0
0
0
0
0
0