MEC1322 Datasheet, PDF (309/456 Pages) Microchip Technology – Keyboard and Embedded Controller for Notebook PC

MEC1322
27.5 Signal Description
TABLE 27-1: SIGNAL DESCRIPTION TABLE
Name
Direction
Description
SPDIN
SPDOUT
SPI_CLK
SPI_CS#
Input
Input/Output
Output
Output
Serial Data In pin
Serial Data Output pin. Switches to input when used in double-data-
rate mode
SPI Clock output used to drive the SPCLK pin.
SPI chip select
Note: The SPI block signals that are shown in Table 27-1 are routed to the SPI pins as listed in Table 27-2.
TABLE 27-2: SIGNAL TO PIN NAME LOOKUP TABLE
Block Name
Pin Name
SPDIN
SPDOUT
SPI_CLK
SPI_CS#
SHD_MISO, PVT_MISO
SHD_MOSI, PVT_MOSI
SHD_SCLK, PVT_SCLK
SHD_CS0#, PVT_CS0#
27.6 Host Interface
The registers defined for the General Purpose Serial Peripheral Interface are accessible by the various hosts as indi-
cated in Section 27.12, "EC-Only Registers".
27.7 Power, Clocks and Reset
This section defines the Power, Clock, and Reset parameters of the block.
27.7.1 POWER DOMAINS
TABLE 27-3:
POWER SOURCES
Name
VCC1
27.7.2 CLOCK INPUTS
Description
The logic and registers implemented in this block are powered by this
power well.
TABLE 27-4: CLOCK INPUTS
Name
48 MHz Ring Oscillator
2MHz
27.7.3 RESETS
Description
This is a clock source for the SPI clock generator.
This is a clock source for the SPI clock generator.
TABLE 27-5: RESET SIGNALS
Name
VCC1_RESET
Description
This signal resets all the registers and logic in this block to their default
state.
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DS00001719D-page 309