Table of Contents
Advertisement
5.1.2 Internal data memory space
The µ PD78014 and 78014Y Subseries incorporate the following RAMs.
(1) Internal high-speed RAM
The µ PD78014 and 78014Y Subseries incorporate the following capacity of internal high-speed RAM in each
product.
4 banks of general registers, each bank consisting of eight 8-bit registers are allocated in the 32-byte area FEE0H
to FEFFH.
The internal high-speed RAM can also be used as a stack memory area.
(2) Buffer RAM
Buffer RAM is allocated to the 32-byte area from FAC0H to FADFH. Buffer RAM is used for storing transmit/
www.DataSheet4U.com
receive data of serial interface channel 1 (3-wire serial I/O mode with automatic transmit/receive function). When
not used in the 3-wire serial I/O mode with automatic transmit/receive function, buffer RAM can also be used
as normal RAM.
5.1.3 Special function register (SFR) area
An on-chip peripheral hardware special-function register (SFR) is allocated in the area FF00H to FFFFH (refer
to Table 5-5. Special Function Register List of 5.2.3 Special function register (SFR)).
Caution
5.1.4 External memory space
External memory space that can be accessed by setting a memory expansion mode register (MM). Program and
table data can be stored, and peripheral devices can be allocated.
Table 5-3. Internal High-Speed RAM Capacities
µ PD78011B, 78011BY
µ PD78012B, 78012BY
µ PD78013, 78013Y
µ PD78014, 78014Y
µ PD78P014, 78P014Y
Do not access addresses where the SFR is not assigned.
CHAPTER 5 CPU ARCHITECTURE
Part Number
Internal High-speed
RAM Capacity
512 × 8 bits
1024 × 8 bits
101
Advertisement
Table of Contents
