Input/Output Pins; Register Descriptions; Pec Calculation Data Entry Register (Pecx) - Renesas H8S/2100 Series Hardware Manual

Section 18 SMBus 2.0 Interface (SMBUS)
18.2

Input/Output Pins

Table 18.1 lists the pins used by the SMBUS.
Table 18.1 Pin Configuration
Channel Symbol*
0 SCL0
SDA0
Note: The suffix 0 indicating the channel is omitted from later descriptions, i.e. the signals are
*
simply denoted by SCL and SDA.
18.3

Register Descriptions

The PEC calculation module of the SMBUS has the following registers. The register configuration
of the SMBUS is shown below. For details on the registers of the communication function
module, see the description of channel 0 in section 17, I
Table 18.2 Register Configuration
Register Name
PEC calculation data entry
register
PEC calculation data re-entry
register
PEC calculation result output
register
18.3.1

PEC Calculation Data Entry Register (PECX)

PECX holds the data on which the PEC calculation will be performed.
Bit Bit Name
7 to 0 PECX7 to
PECX0
Rev. 1.00 May 09, 2008 Page 548 of 954
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Input/Output Function
Input/Output
Input/Output
Abbreviation
PECX
PECY
PECZ
Initial
Value R/W Description
All 0 R/W PEC Calculation Entry Data 7 to 0
These bits hold the data on which PEC calculation will
be performed.
Serial clock input/output pin of SMBUS
Serial data input/output pin of SMBUS
2
C Bus Interface (IIC).
R/W Initial Value Address
R/W H'00
R/W H'00
R H'00
Data Bus
Width
H'FD60 8
H'FD61 8
H'FD63 8