PIC18F23K20-ESLASHML datasheet(213/456 Pages) MICROCHIP

213 / 456 page

 2010 Microchip Technology Inc.

DS41303G-page 213

PIC18F2XK20/4XK20

17.4.3.4

SSP Mask Register

An SSP Mask (SSPMSK) register is available in I2C

Slave mode as a mask for the value held in the

SSPSR

during

address

comparison

operation. A zero (‘0’) bit in the SSPMSK register has

the effect of making the corresponding bit in the

SSPSR register a “don’t care”.

This register is reset to all ‘1’s upon any Reset

condition and, therefore, has no effect on standard

SSP operation until written with a mask value.

This register must be initiated prior to setting

SSPM<3:0> bits to select the I2C Slave mode (7-bit or

10-bit address).

The SSP Mask register is active during:

• 7-bit Address mode: address compare of A<7:1>.

• 10-bit Address mode: address compare of A<7:0>

only. The SSP mask has no effect during the

reception of the first (high) byte of the address.

SSPMSK: SSP MASK REGISTER

R/W-1

MSK7

MSK6

MSK5

MSK4

MSK3

MSK2

MSK1

MSK0(1)

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 7-1

MSK<7:1>: Mask bits

= The received address bit n is compared to SSPADD<n> to detect I2C address match

= The received address bit n is not used to detect I2C address match

bit 0

MSK<0>: Mask bit for I2C Slave mode, 10-bit Address(1)

I2C Slave mode, 10-bit Address (SSPM<3:0> = 0111):

= The received address bit 0 is compared to SSPADD<0> to detect I2C address match

= The received address bit 0 is not used to detect I2C address match

Note 1: The MSK0 bit is used only in 10-bit slave mode. In all other modes, this bit has no effect.

PIC18F23K20-E/ML Datasheet(PDF) 213 Page - Microchip Technology

PIC18F23K20-E/ML Datasheet(HTML) 213 Page - Microchip Technology

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

Datasheet Download

Link URL