PC312XDP512F0CFVR datasheet(400/1348 Pages) FREESCALE

Numer części	PC312XDP512F0CFVR

Szczegółowy opis	HCS12X Microcontrollers

PDF	1348 Pages

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Producent	FREESCALE [Freescale Semiconductor, Inc]

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400 / 1348 page

Chapter 9 Inter-Integrated Circuit (IICV2) Block Description

MC9S12XDP512 Data Sheet, Rev. 2.21

400

Freescale Semiconductor

The number of clocks from the falling edge of SCL to the ﬁrst tap (Tap[1]) is deﬁned by the values shown

in the scl2tap column of Table 9-3, all subsequent tap points are separated by 2IBC5-3 as shown in the

tap2tap column in Table 9-3. The SCL Tap is used to generated the SCL period and the SDA Tap is used

to determine the delay from the falling edge of SCL to SDA changing, the SDA hold time.

IBC7–6 deﬁnes the multiplier factor MUL. The values of MUL are shown in the Table 9-4.

Figure 9-5. SCL Divider and SDA Hold

The equation used to generate the divider values from the IBFD bits is:

SCL Divider = MUL x {2 x (scl2tap + [(SCL_Tap -1) x tap2tap] + 2)}

Table 9-4. Multiplier Factor

IBC7-6

MUL

RESERVED

SCL Divider

SDA Hold

SCL

SDA

SCL

START condition

STOP condition

SCL Hold(start)

SCL Hold(stop)

PC312XDP512F0CFVR Arkusz danych(PDF) 400 Page - Freescale Semiconductor, Inc