SH7014 Datasheet, PDF (505/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

16. Pin Function Controller (PFC)
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: 15
14
13
12
11
10
9
8
PE15 PE15 PE14 PE14
⎯
⎯
⎯
⎯
MD1 MD0 MD1 MD0
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R/W R/W
R
R
R
R
Bit: 7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Initial value: 0
0
0
0
0
0
0
0
R/W: R
R
R
R
R
R
R
R
Bits 15 and 14⎯PE15 Mode 1, 0 (PE15MD1 and PE15MD0): These bits select the function of
the PE15/DACK1 pin.
Bit 15
PE15MD1
0
1
Bit 14
PE15MD0
0
1
0
1
Description
Input/output (PE15)
Reserved
DMA request received output (DACK1)
(PE15 in single-chip mode)
Reserved
(initial value)
Rev.5.00 Sep. 27, 2007 Page 471 of 716
REJ09B0398-0500