IC-TW14 Datasheet, PDF(31/33 Page) IC-Haus GmbH

English

English German Russian Spanish Italian Polish Chinese Japanese Korean French Portuguese	Language :

IC-TW14 Datasheet, PDF (31/33 Pages) IC-Haus GmbH – IC-PMX Companion Chip

◁

iC-TW14

iC-PMX Companion Chip

Rev A1, Page 31/33

the FRAM datasheet for more information. When the

read is complete, the iC-TW14 sets MODE/CMD to 0

(Normal Operation).

For example,to read the 6 bytes of multiturn position

data from the FRAM, write 0x0018 (24) to the MODE/-

CMD register. When MODE/CMD = 0, the FRAM ac-

cess is done and the data is available in DATA.0 â

DATA.2 as shown in Table 64 (assuming that the FRAM

multiturn position write command example shown ear-

lier had been previously executed and no Wiegand

pulses have occurred in the meantime).

and the FRAM WRTSs command (op-code 0x3F). The

existing values of PP (FRAM address 0x000 Bit 0) and

DIR (FRAM address 0x000 Bit 1) are preserved (not

affected) and DIRâ (FRAM address 0x005 Bit 5) is made

equal to DIR (FRAM address 0x000 Bit 1). EFLAG

(FRAM address 0x005 Bits 7:6) and FRAM counter bits

32:42 (FRAM address 0x004 Bit 2 â FRAM address

0x005 Bit 4) are reset to zero. See FRAM Access in the

iC-PMX datasheet and MEMORY MAP for POS0/1/2/3

in the FRAM datasheet for more information. When the

command is complete, the iC-TW14 sets MODE/CMD

to NORMAL (0).

FRAM Address

0x001

0x000

0x003

0x002

0x005

0x004

F_MT_R Example

Data

Bits

0x89

0xAB

DATA.0

15:8

7:0

0x45

0x67

DATA.1

15:8

7:0

0x01

0x23

DATA.2

15:8

7:0

For example, to set the FRAM multiturn position to

0x0123,4567, set DATA.0 â DATA.1 as shown Table 65

and write 0x0019 (25) to the MODE/CMD register. This

sets the multiturn position without affecting the PP and

DIR bits to allow proper turns counting after etting the

multiturn position. When the command is complete, the

iC-TW14 sets MODE/CMD to NORMAL (0).

Table 64: FRAM Multiturn Position Read Example

The F_SET_MT command (25) is used to set the FRAM

multiturn position to a specific value. This command

writes the 32-bit multiturn position in DATA.0 â DATA.1

to FRAM addresses 0x000 â 0x005 with special en-

coding using FRAM feedthrough mode in the iC-PMX

DATA.0 15:8

7:0

DATA.1

15:8

7:0

F_SET_MT Example

Data FRAM Bits

0x45 Counter(15:8)

0x67 Counter(7:0)

0x01 Counter(31:24)

0x23 Counter(23:16)

Table 65: Set FRAM Multiturn Position Example

▷