EVENT PROCESSOR ARRAY (EPA)

EPAx_CON (Continued)

Address:

See Table 11-3 on page 11-3

x = 0–1 (8XC196MH)

Reset State:

00H

x = 0–3 (8XC196MC)

 

 

x = 0–5 (8XC196MD)

 

 

The EPA control (EPAx_CON) registers control the functions of their assigned capture/compare channels.

x = 0, 2, 4

7

TB

CE

M1

M0

 

 

 

 

0

RE

WGR

ROT

ON/RT

 

 

 

 

7

0

x = 1, 3, 5

TB

CE

M1

M0

RE

AD

ROT

ON/RT

Bit

Bit

 

Function

Number

Mnemonic

 

 

 

 

 

 

1

ROT

Reset Opposite Timer

 

 

Controls different functions for capture and compare modes.

 

 

In Capture Mode:

 

 

0

= causes no action

 

 

1

= resets the opposite timer

 

 

In Compare Mode:

 

 

Selects the timer that is to be reset if the RT bit is set.

 

 

0

= selects the reference timer for possible reset

 

 

1

= selects the opposite timer for possible reset

 

 

The TB bit (bit 7) selects which is the reference timer and which is the

 

 

opposite timer.

 

 

 

0

ON/RT

Overwrite New/Reset Timer

 

 

The ON/RT bit functions as overwrite new in capture mode and reset

 

 

timer in compare mode.

 

 

In Capture Mode (ON):

 

 

An overrun error is generated when an input capture occurs while the

 

 

event-time register (EPAx_TIME) and its buffer are both full. When an

 

 

overrun occurs, the ON bit determines whether old data is overwritten or

 

 

new data is ignored:

 

 

0

= ignores new data

 

 

1

= overwrites old data in the buffer

 

 

In Compare Mode (RT):

 

 

0

= disables the reset function

 

 

1

= resets the ROT-selected timer

 

 

 

 

Figure 11-10. EPA Control (EPAx_CON) Registers (Continued)

11-21

Page 260
Image 260
Intel 8XC196MC, 8XC196MD, 8XC196MH manual Capture Mode on, Compare Mode RT