ST72361 datasheet(211/224 Pages) STMICROELECTRONICS

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ST72361

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FLASH OPTION BYTES (Cont’d)

OPT2:1 = PKG[1:0] Package selection

These option bits select the device package.

Note: Pads that are not bonded to external pins

are in input pull-up configuration when the pack-

age selection option bits have been properly pro-

grammed. The configuration of these pads must

be kept in reset state to avoid added current con-

sumption.

OPT0 = FMP_R Flash memory read-out protec-

tion

Read-out protection, when selected provides a

protection against program memory content ex-

traction and against write access to Flash memo-

ry. Erasing the option bytes when the FMP_R op-

tion is selected causes the whole user memory to

be erased first, and the device can be repro-

grammed. Refer to Section 4.3.1 and the ST7

Flash Programming Reference Manual for more

details.

0: Read-out protection enabled

1: Read-out protection disabled

OPTION BYTE 1

OPT7:6 = AFI_MAP[1:0] AFI Mapping

These option bits allow the mapping of some of the

Alternate Functions to be changed.

OPT5:4 = OSCTYPE[1:0] Oscillator Type

These option bits select the ST7 main clock

source type.

OPT3:2 = OSCRANGE[1:0] Oscillator range

If the resonator oscillator type is selected, these

option bits select the resonator oscillator. This se-

lection corresponds to the frequency range of the

resonator used. If external source is selected with

the OSCTYPE option, then the OSCRANGE op-

tion must be selected with the corresponding

range.

OPT1 = Reserved

OPT0 = RSTC RESET clock cycle selection

This option bit selects the number of CPU cycles

inserted during the RESET phase and when exit-

ing HALT mode. For resonator oscillators, it is ad-

vised to select 4096 due to the long crystal stabili-

zation time.

0: Reset phase with 4096 CPU cycles

1: Reset phase with 256 CPU cycles

Selected Package

PKG

LQFP 64

LQFP 44

LQFP 32

AFI Mapping 1

AFI_MAP(1)

T16_OCMP1 on PD3

T16_OCMP2 on PD5

T16_ICAP1 on PD4

LINSCI2_SCK not available

LINSCI2_TDO not available

LINSCI2_RDI not available

T16_OCMP1 on PB6

T16_OCMP2 on PB7

T16_ICAP1 on PC0

LINSCI2_SCK on PD3

LINSCI2_TDO on PD5

LINSCI2_RDI on PD4

AFI Mapping 0

AFI_MAP(0)

T16_ICAP2 is mapped on PD1

T16_ICAP2 is mapped on PC1

Clock Source

OSCTYPE

Resonator Oscillator

Reserved

Reserved internal clock source

(used only in ICC mode)

External Source

Typ. Freq. Range

OSCRANGE

1~2 MHz

2~4 MHz

4~8 MHz

8~16 MHz

ST72361 Datasheet(PDF) 211 Page - STMicroelectronics

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