ST10F296 datasheet(45/346 Pages) STMICROELECTRONICS

45 / 346 page

Obsolete

Product(s)

- Obsolete

Product(s)

ST10F296E

Internal Flash memory

45/346

Table 10 shows the composition of the control register interface. These registers can be

addressed by the CPU

5.1.3

Low power mode

The Flash modules are automatically switched off when executing the PWRDN instruction.

Consumption is drastically reduced, but, exiting this state can take a long time (tPD).

Note:

Recovery time from power-down mode for the Flash modules is shorter than the main

oscillator start-up time. To avoid problems restarting to fetch code from the Flash, it is

important to properly size the external circuit on the RPD pin.

Power-off Flash mode is entered only at the end of the Flash write operation.

5.2

Write operation

The Flash modules have a single register interface mapped in the memory space of the

XFlash module (0x0E 0000 to 0x0E 0013). All operations are enabled through four 16-bit

control registers: Flash control register 1-0 high/low (FCR1H/L-FCR0H/L). Eight other 16-bit

registers are used to store Flash addresses and data for program operations (FARH/L and

FDR1H/L-FDR0H/L) and write operation error flags (FERH/L). All registers are accessible

with 8 and 16-bit instructions (since they are mapped on the ST10 XBus).

Note:

Before accessing the XFlash module (and consequently the Flash register to be used for

program/erasing operations), the XFLASHEN bit in the XPERCON register and the XPEN

bit in the SYSCON register must be set.

The four Flash module banks have their own dedicated sense amplifiers, so that any bank

can be read while any other bank is written. However simultaneous write operations (‘write’

meaning either program or erase) on different banks are forbidden. When a write operation

is occurring in the Flash, no other write operations can be performed.

Table 10.

Control register interface

Name

Description

Addresses

Size

(byte)

ST10

bus size

FCR1-0

Flash control registers 1-0

0x000E 0000 - 0x000E 0007

16-bit

(XBus)

FDR1-0

Flash data registers 1-0

0x000E 0008 - 0x000E 000F

FAR

Flash address registers

0x000E 0010 - 0x000E 0013

FER

Flash error register

0x000E 0014 - 0x000E 0015

FNVWPXR

Flash non volatile protection X

0x000E DFB0 - 0x000E DFB3

FNVWPIR

Flash non volatile protection I

0x000E DFB4 - 0x000E DFB7

FNVAPR0

Flash non volatile access

protection register 0

0x000E DFB8 - 0x000E DFB9

FNVAPR1

Flash non volatile access

protection register 1

0x000E DFBC - 0x000E DFBF

XFICR

XFlash interface control register

0x000E E000 - 0x000E E001

Obsolete

Product(s)

- Obsolete

Product(s)

ST10F296 Scheda tecnica(PDF) 45 Page - STMicroelectronics

ST10F296 Scheda tecnica(HTML) 45 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Scheda tecnica Scarica

Link URL