MC68HC05X16 Datasheet, PDF (36/232 Pages) Freescale Semiconductor, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

Freescale Semiconductor, Inc.
2.3.4 MDS
2
A pull-down device is activated on this pin each time the RESET pin is pulled low. Even after the
RESET pin is pulled high, the pull-down on the MDS pin will remain active until the pin is pulled
high. In single-chip mode MDS can be connected to VSS or left floating. When MDS is tied to V_DD
at the end of reset, it is used to select any mode of operation other than single-chip mode. This
has the same effect as tying IRQ to 2V_DD. See Section 2.1.
Note:
Although this pin can be left floating to select single-chip mode, it is advisable to
hard-connect it to VSS, especially in an electrically noisy environment.
2.3.5 TCAP1
The TCAP1 input controls the input capture 1 function of the on-chip programmable timer system.
2.3.6 TCAP2
The TCAP2 input controls the input capture 2 function of the on-chip programmable timer system.
2.3.7 TCMP1
The TCMP1 pin is the output of the output compare 1 function of the timer system.
2.3.8 TCMP2
The TCMP2 pin is the output of the output compare 2 function of the timer system.
2.3.9 RDI (Receive data in)
The RDI pin is the input pin of the SCI receiver.
2.3.10 TDO (Transmit data out)
The TDO pin is the output pin of the SCI transmitter.
MODES OF OPERATION AND PIN DESCRIPTIONS MC68HC05X16
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