SH7014 datasheet(505/754 Pages) RENESAS

505 / 754 page

16. Pin Function Controller (PFC)

Rev.5.00 Sep. 27, 2007 Page 471 of 716

REJ09B0398-0500

16.3.10

Port E Control Registers 1, 2 (PECR1 and PECR2)

PECR1 and PECR2 are 16-bit read/write registers that select the functions of the sixteen

multiplexed pins of port E. PECR1 selects the functions of the upper eight bit pins of port E;

PECR2 selects the function of the lower eight bit pins of port E.

Port E includes a bus control signal (

AH) and DMAC control signals (DACK1, DACK0, DRAK1,

and DRAK0), but in the SH7016 and SH7017, settings in these registers relating to the selection

of these pin functions may be invalid in single-chip mode. For details, see table 16.3, Pin

Functions in Each Operating Mode.

PECR1 and PECR2 are both initialized to H'0000 by external power-on reset but are not initialized

for reset by WDT, standby mode, or sleep mode, so the previous data is maintained.

Port E Control Register 1 (PECR1):

Bit:

PE15

MD1

PE15

MD0

PE14

MD1

PE14

MD0

⎯

Initial value:

R/W:

R/W

Bit:

⎯

Initial value:

R/W:

Bits 15 and 14

⎯PE15 Mode 1, 0 (PE15MD1 and PE15MD0): These bits select the function of

the PE15/DACK1 pin.

Bit 15

PE15MD1

Bit 14

PE15MD0

Description

Input/output (PE15)

(initial value)

Reserved

DMA request received output (DACK1)

(PE15 in single-chip mode)

Reserved

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