Hitachi H8S/2645, Hardware Manual

Page: 7 / 1153

List of Items Revised or Added for This Version
Section Page Description
2.10.2 Caution to
observe when using
bit manipulation
instructions 76, 77 Newly added
The BSET, BCLR, BNOT, BST and BIST instructions read data in a unit of byte,
then, after bit manipulation, they write data in a unit of byte. Therefore, caution
must be exercised when executing any of these instructions for registers and
ports that include write-only bits.
The BCLR instruction can be used to clear the flag of an internal I/O register to
0. In that case, if it is clearly known that the pertinent flag is set to 1 in an
interrupt processing routine or other processing, there is no need to read the
flag in advance.
8.3.10 Number of
DTC Execution States
207 4th line changed as follows
Number of execution states = I · (S
I
+1) +
Σ
(J · S
J
+ K · S
K
+ L · S
L
) + M · S
M
For example, when the DTC vector address table is located in on-chip ROM,
normal mode is set, and data is transferred from the on-chip ROM to an internal
I/O register, the time required for the DTC operation is 14 states. The time from
activation to the end of the data write is 11 states.
9.4.2 Register
Configuration
Table 9-6 Port 3
Register
Configuration
242
Name Abbreviation R/W Initial Value Address *
Port 3 data direction register P3DDR W H'00 H'FE32
Port 3 data register P3DR R/W H'00 H'FF02
Port 3 register PORT3 R Undefined H'FFB2
Port 3 open drain control register P3ODR R/W H'00 H'FE46
9.9.2 Register
Configuration 263
15th line changed as follows
In mode 7, if a pin is in the input state in accordance with the settings in the
DDR, setting the corresponding PBPCR bit to 1 turns on the MOS input pull-up
for that pin.
9.10.3 Pin Functions
Table 9-20 Port C
Pin Functions
269 (Incorrect)PCDDR
(Correct)PCnDDR
9.13.1 Overview
Figure 9-12 Port F
Pin Functions
281
PF7 (input) / ø (output)
PF6 (I/O) /
AS
(output) / SEG20 (output) / SEG36
*
(output)
PF5 (I/O) /
RD
(output) / SEG19 (output) / SEG35
*
(output)
Pin functions in modes 4 to 6