Datasheet

MC9RS08KA2 Series Data Sheet, Rev. 4
Freescale Semiconductor 15
Chapter 1
MC9RS08KA2 Series Device Overview
1.1 Overview
The MC9RS08KA2 Series microcontroller unit (MCU) is an extremely low-cost, small pin count device
for home appliances, toys, and small geometry applications. This device is composed of standard on-chip
modules including, a very small and highly efficient RS08 CPU core, 63 bytes RAM, 2K bytes Flash, an
8-bit modulo timer, keyboard interrupt, and analog comparator. The device is available in small 6- and
8-pin packages.
1.2 MCU Block Diagram
The block diagram, Figure 1-1, shows the structure of the MC9RS08KA2 Series MCU.
Figure 1-1. MC9RS08KA2 Series Block Diagram
RS08 CORE
USER FLASH
USER RAM — 63 BYTES
NOTES:
(1) Pins are software configurable with pullup/pulldown device if input port.
(2) Integrated pullup device enabled if reset enabled (RSTPE=1).
(3) These pins are not available in 6-pin package.
POWER AND
PTA
V
SS
V
DD
INTERNAL CLOCK
SOURCE
BDC
RS08 SYSTEM CONTROL
RTI
CPU
COP
WAKEUP LVD
RESET AND STOP WAKEUP
MODES OF OPERATION
POWER MANAGEMENT
5-BIT KEYBOARD
INTERRUPT MODULE
PTA0/KBIP0/ACMP+
(1)
PTA1/KBIP1/ACMP-
(1)
PTA2/KBIP2/TCLK/RESET/V
PP
(1),( 2)
PTA3/ACMPO/BKGD/MS
ANALOG COMPARATOR
MODULE
MODULO TIMER
MODULE
PTA4/KBIP4
(1),(3)
PTA5/KBIP5
(1), (3)
INTERNAL REGULATOR
(
KBI )
5
TCLK
ACMP-
ACMP+
ACMPO
(
ICS )
(
ACMP )
(
MTIM )
MC9RS08KA2 — 2048 BYTES
MC9RS08KA1 — 1024 BYTES